Hypospadias is a congenital condition where the opening of the urethra is on the underside of the penis. It is usually noticed at birth and does not cause pain, but it can affect urination and later sexual function. Many people with hypospadias have a curved penis or a hooded foreskin, and doctors describe these as visible features. It is not life-threatening, and most children do well with standard surgical repair in infancy or early childhood. Not everyone will have the same experience, and follow-up with a pediatric urologist helps guide timing and care.
Overview
HypospadiasSymptoms
Hypospadias is noticed at birth. Signs include the urine opening on the underside of the penis, a hooded foreskin, and a downward curve. Some babies and children have a spraying or deflected urine stream when peeing.
Outlook and prognosis
Most boys with hypospadias do well long term, especially when repaired in early childhood. Surgery typically results in straight urination, normal sexual function, and typical fertility, though some need minor touch‑ups or follow‑up into puberty. Early symptoms of hypospadias often improve after treatment.
Causes and risk factors
Hypospadias begins in early pregnancy and often stems from inherited or new genetic changes. Risk may increase with family history, some hormone exposures, assisted reproduction, maternal diabetes, prematurity, or low birth weight. Many cases have no identifiable cause.
Genetic influences
Genetics play a meaningful role in hypospadias. Having a close relative affected raises risk, and multiple gene variations, along with hormone signaling differences, can contribute. Environmental factors during early pregnancy also interact with genetic susceptibility.
Diagnosis
Hypospadias is usually diagnosed at birth by a physical exam noting the urethral opening’s position, penile curvature, and foreskin pattern. In severe cases or with undescended testes, diagnosis of hypospadias may include imaging or genetic tests to assess related differences.
Treatment and drugs
Hypospadias is usually managed with outpatient surgery to move the urine opening, straighten curvature, and improve future function. Timing is individualized, often between 6–18 months. Pain control, careful wound care, and follow-up support healing and long-term urinary and sexual health.
Symptoms
Parents often spot early features of hypospadias during diaper changes or toilet training. In medical terms, this is hypospadias; in everyday life, it shows up as a different opening position, a hooded foreskin, a downward curve, or a urine stream that sprays or points down. These features are present from birth, and how noticeable they are can vary widely.
The pee opening sits on the underside of the head, the shaft, or near the scrotum instead of the tip. This changes the direction of urine and is the main visible difference.
Pee may spray, split, or point downward. Toddlers may need to sit to urinate to avoid soaking clothes. Parents may notice wet spots on shoes or the floor during toilet training.
The penis may curve downward, especially during an erection. The bend can make hygiene or sexual activity uncomfortable later if it is pronounced.
The foreskin may look like a hood, with extra skin on top and less underneath. Circumcision is usually postponed until a specialist evaluates hypospadias because the foreskin may be needed for repair.
How people usually first notice Hypospadias?
Parents and doctors usually first notice hypospadias during the newborn exam, when the opening where urine comes out sits lower on the underside of the penis rather than at the tip, sometimes with a hooded-looking foreskin or a slight downward curve. In milder cases, it might be picked up a little later when diaper changes reveal the urine stream sprays downward or to the side. If prenatal ultrasound shows atypical genital development, families may be told to expect evaluation after birth, but confirmation is typically made by a pediatrician at the first check-ups—these are the first signs of hypospadias.
Types of Hypospadias
Hypospadias has recognized clinical variants based on where the urethral opening sits on the penis and how the foreskin and penile curve develop. These types of hypospadias can look different in daily life, from a stream that sprays during urination to a downward bend noticeable during erections later on. Symptoms don’t always look the same for everyone. Not everyone will experience every type, and severity can range from mild to more complex forms that benefit from pediatric urology care.
Glanular type
The opening sits on the glans (head) but a bit lower than usual. Peeing may be mostly straight with mild spraying. The foreskin may be hooded on top with less skin underneath.
Coronal type
The opening is at the rim where the head meets the shaft. Spraying or a downward-angled stream is common. Foreskin asymmetry and mild curvature may appear.
Subcoronal type
The opening lies just below the rim on the upper shaft. Urination can spray or deflect, sometimes wetting the scrotum. Curvature is usually mild but can be noticeable.
Midshaft type
The opening is partway down the penile shaft. Pee stream often deflects downward and may require sitting to urinate. Curvature (chordee) is more likely and can affect sexual function later.
Proximal shaft
The opening is near the base of the shaft. Urination typically sprays or strongly angles downward. Penile curvature is common and may be moderate to severe.
Penoscrotal type
The opening sits where the penis meets the scrotum. Children often need to sit to urinate. Curvature and underdeveloped ventral skin are frequent.
Scrotal type
The opening is on the scrotum. Urine usually exits downward with significant spraying. Marked curvature and associated genital differences may occur.
Perineal type
The opening is behind the scrotum in the perineum. Urination requires sitting and can be hard to direct. This severe variant often has pronounced curvature and may be linked with other urogenital differences.
What genetics can tell you about symptoms
Some genetic variations can change how tissues respond to male hormones in early pregnancy, leading to the urethral opening forming lower on the penis and a hooded or incomplete foreskin. Variants in genes guiding genital development (like SRD5A2 or AR) are linked to curvature, spraying urine, or downward-pointing stream.
Causes and risk factors
Risk factors for hypospadias involve genes, hormones, and pregnancy conditions. Some risks are modifiable (things you can change), and others are non-modifiable (things you can’t). Having a close relative with hypospadias raises risk, and gene changes that affect male hormone signals can be inherited or new. Pregnancy factors like placental problems, preterm birth, or low birth weight are linked with higher risk. Environmental influences, including some chemicals or certain medications in early pregnancy, are under study, so discuss any exposures or fertility treatments with your care team.
Environmental and biological risk factors
The likelihood of hypospadias can be shaped by conditions during pregnancy and how the placenta and fetus develop. Some risks are carried inside the body, others come from the world around us. Having one or more risk factors does not mean hypospadias will occur, and studies vary in how strong these links are. Risk factors don’t always predict early symptoms of hypospadias, but they help clinicians decide when to look more closely.
Pregnancies in people aged 35 or older are linked to a slightly higher chance of hypospadias. Age-related changes in hormones and the placenta may play a role.
Fathers in their 40s or beyond have been associated with a modest increase in risk in some studies. This may relate to changes in sperm over time, though findings are not uniform.
Pre-existing diabetes before pregnancy has been linked to higher rates of some birth differences, including hypospadias. High glucose early in pregnancy can affect organ formation.
Conditions that reduce placental blood flow, such as preeclampsia or placental insufficiency, are associated with increased risk. Reduced delivery of oxygen and hormones during early development may influence urethral formation.
Genetic risk factors
Genetic factors play an important role in how the urethra forms before birth. Researchers have identified several genetic risk factors for hypospadias, ranging from family history to rare changes in hormone-related genes. Carrying a genetic change doesn’t guarantee the condition will appear. Genetic testing or counseling may be considered when hypospadias is moderate to severe, runs in families, or occurs with other differences such as undescended testes.
Family history: Having a father or brother with hypospadias raises the chance in another child. Patterns within families suggest inherited influences even when no single gene is found.
Androgen receptor changes: Changes in the androgen receptor can blunt how tissues respond to male hormones during fetal development. This reduced signaling can affect urethral closure with varying severity.
5-alpha-reductase gene: Variants in the 5-alpha-reductase type 2 enzyme gene limit conversion of testosterone to DHT in genital tissue. Lower local DHT can lead to hypospadias.
Hormone-making genes: Changes in other hormone-making genes can reduce testosterone production or action at key times in pregnancy. This hormonal shortfall can increase the likelihood of the condition.
Genital development genes: Rare variants in genes that pattern the urethra and penis can disrupt closure. HOXA13 changes, for example, can cause hand-foot-genital syndrome that often includes hypospadias.
Chromosome differences: Extra or missing pieces of chromosomes, including sex chromosomes, can alter signals that shape the urethra. These abnormalities are uncommon but seen more in moderate to severe cases.
Common DNA variants: Many small DNA changes across the genome each add a tiny effect. Together they can nudge risk upward, helping explain milder or isolated presentations.
Variable inheritance: Hypospadias often reflects a mix of rare, stronger variants and many common ones rather than a single-gene cause. This is why risk can differ between relatives who share some of the same genes.
Lifestyle risk factors
Hypospadias is present from birth; lifestyle habits do not cause it, but they can influence symptoms, day‑to‑day function, and recovery after treatment. Understanding how lifestyle affects Hypospadias helps reduce irritation, infections, and surgical complications. Below are practical lifestyle risk factors for Hypospadias that can either worsen or ease common issues.
Regular, gentle cleaning reduces inflammation around the urethral opening and lowers urinary tract infection risk. Avoid harsh soaps and aggressive scrubbing that can worsen stinging or spraying.
Frequent diaper changes limit urine contact that can irritate the ventral meatus and any healing tissue. Barrier creams protect skin and make hygiene easier.
Sitting to urinate or using careful aiming can reduce spraying and dribbling. Double voiding and taking time to empty can lower urinary tract infection risk.
Adequate fluids dilute urine so it stings less at the ectopic opening. Limiting caffeine and acidic drinks can reduce urgency and burning in older children and adults.
Risk prevention
Hypospadias starts during fetal development, so there’s no way to fully prevent it, but you can lower some risks before and during early pregnancy. Prevention is about lowering risk, not eliminating it completely. Because there are no early symptoms of hypospadias during pregnancy, planning ahead matters most. Steps like managing health conditions, avoiding tobacco and unnecessary hormones, and reducing certain chemical exposures may help reduce the chance of hypospadias.
Managing diabetes and reaching a healthy weight before pregnancy may lower the chance of birth differences like hypospadias. Start a prenatal vitamin with folic acid at least one month before trying to conceive. Regular check-ins can fine-tune any needed medicines.
Quitting tobacco and nicotine before conception and during pregnancy may reduce the risk of hypospadias. Ask your clinician about supports like counseling, nicotine replacement, or medications.
Review all prescription, over‑the‑counter, and herbal products with your clinician before you conceive. Avoid hormone treatments—especially progestins—in early pregnancy unless clearly needed, as some have been linked to a higher risk of hypospadias.
Reduce contact with pesticides, solvents, and plastics containing phthalates or BPA by using fragrance‑free products, good ventilation, and avoiding heating food in plastic. These steps may lower exposure to endocrine‑disrupting chemicals that have been associated with hypospadias.
Transmission
Hypospadias is not contagious; it can’t be caught, passed through sex, or spread by shared bathrooms. It develops before birth when the urinary opening forms lower than usual on the penis. Hypospadias can run in families, with a higher chance if a father or brother has it, but there isn’t a single “hypospadias gene.” Instead, it usually reflects a mix of inherited genes and pregnancy factors, and it can also appear as a new change with no family history. If you’re wondering about the genetic transmission of hypospadias and family planning, a genetics professional can explain how hypospadias is inherited and discuss the chance in a future pregnancy.
When to test your genes
Hypospadias is a congenital condition, so genetic testing isn’t routine for everyone. Consider testing if there’s a strong family history, hypospadias is severe or paired with undescended testes or atypical genital development, or if a clinician suspects a difference in sex development. Testing can guide counseling, future family planning, and tailored care.
Diagnosis
Hypospadias is usually identified soon after birth based on how the opening for urine looks and where it sits on the underside of the penis. Doctors usually begin with a careful physical exam and a brief review of pregnancy and family history. The diagnosis of hypospadias is primarily clinical, with tests used only in specific situations. More detailed evaluations are considered when the opening is very far back, the penis curves, or the testes have not descended.
The provider looks at the location of the urine opening and the shape of the foreskin. Hypospadias is often recognized immediately because the opening sits on the underside rather than the tip.
The exact position of the opening (near the tip, mid-shaft, or close to the base) helps describe severity. This guides timing and planning of any future repair for hypospadias.
The penis is gently examined for downward bend. Noting curvature helps predict surgical needs and the best timing to correct hypospadias.
The exam also looks for undescended testes, a split or hooded foreskin, and any hernias. These findings can point to broader patterns sometimes linked with hypospadias.
Stages of Hypospadias
Hypospadias does not have defined progression stages. It’s a difference in how the opening of the urethra forms before birth, so it’s present from day one and typically does not “progress,” though doctors may describe types based on location. Most cases are identified during the newborn exam, and parents may notice early symptoms of hypospadias like a downward or spraying urine stream during diaper changes. A pediatric urologist usually confirms the details and plans care if needed; early and accurate diagnosis helps you plan ahead with confidence.
Outlook and prognosis
Daily routines often adapt after a baby is diagnosed with hypospadias, but most families settle into a steady rhythm once a care plan is in place. Early care can make a real difference, especially when surgery is planned in the first year of life by an experienced pediatric urologist. For many children with hypospadias, the long-term outlook is excellent: normal growth, typical urination, and good sexual and reproductive health in adulthood. Serious complications are uncommon, and mortality from hypospadias itself is not expected.
Looking at the long-term picture can be helpful. Some children need one surgery, while others benefit from staged procedures or a later touch‑up to address a fistula (a small leak), curvature, or a narrow urinary opening. Most early symptoms of hypospadias—like a downward urinary stream or a hooded foreskin—are fully addressed with repair, though a small number of people may notice spray, dribbling, or curvature during erections later and choose additional care. Fertility is usually normal; when the opening is farther down the shaft or associated with curvature, semen delivery can be affected, but this is often correctable.
Understanding the prognosis can guide planning and set expectations as your child grows. With ongoing care, many people maintain healthy urinary and sexual function and lead active, unrestricted lives. Teens and adults who had repair as children may have questions about appearance, sensation, or sexual function; periodic check‑ins with a urology team can help spot and fix small issues before they become bothersome. Talk with your doctor about what your personal outlook might look like, including signs of problems to watch for and the best timing for follow‑up.
Long-term effects
Hypospadias can have different long-term effects that show up in childhood, adolescence, or adulthood. Long-term effects vary widely, and many people do well after early repair. Many families first notice early symptoms of hypospadias at birth, but the long-term picture depends on how severe it was and what surgery was done. Most people lead full lives, though some may need follow-up as the body grows and changes.
A split or downward stream can persist, making aim less predictable. This can happen even after repair, especially with more severe forms.
The urine channel can become tight, leading to a weak stream or straining. Some develop repeated infections when urine flow is slowed.
A small second opening can allow urine to leak from an unintended spot. This is most often a result of prior surgery and may be noticed in childhood or later.
Curvature with erection can remain or reappear as the body grows. For some, it causes discomfort or makes intercourse difficult.
How is it to live with Hypospadias?
Living with hypospadias varies widely. Many boys have a straightforward repair in infancy and grow up urinating comfortably, with typical sexual function and fertility, needing only routine follow-up. For others—especially with more severe forms or if multiple surgeries were needed—there can be practical considerations like aiming while urinating, occasional spraying or dribbling, and worries about appearance or scarring that may affect confidence during adolescence and intimacy later on. Families and partners often play a supportive role, helping with early care, normalizing conversations about bodies, and encouraging check-ins with a urologist if new symptoms, pain, curvature, or concerns about sexual function arise.
Treatment and drugs
Hypospadias is treated with surgery to move the urethral opening to the tip of the penis and straighten any downward curve, usually done once a baby is stable and growing well—often between 6 and 18 months of age. Although living with hypospadias can feel overwhelming, most children do very well after repair and have normal urination and sexual function later in life. Before surgery, doctors usually advise avoiding newborn circumcision so the foreskin can be used as graft tissue if needed, and pain control plus protective dressings are used after surgery to support healing. Not every treatment works the same way for every person, so surgeons tailor the plan based on where the opening sits, how curved the penis is, and whether there were prior surgeries. Ask your doctor about the best starting point for you, including timing, type of repair, anesthesia, and follow-up for early symptoms of complications such as swelling, bleeding, infection, or a urine leak.
Non-drug treatment
Day to day, families often notice issues like a downward-spraying urine stream or a foreskin that looks different during diaper changes, which can make toileting messy and stressful. These early symptoms of hypospadias usually lead to a visit with a pediatric urologist to review options and timing. Non-drug treatments often lay the foundation for comfort, healing, and long-term function, whether or not surgery is planned. Plans are individualized based on the child’s age, anatomy, and any related health findings.
The main treatment for hypospadias is an operation to straighten the penis and bring the urine opening to the tip. It is usually done in early childhood as day surgery with careful follow-up. Outcomes are often good, though a second procedure is sometimes needed.
Very mild hypospadias that does not affect the urine stream or cause bending may be safely watched. Your urologist will monitor growth, stream direction, and comfort over time.
Do not circumcise until a urologist has evaluated hypospadias. Foreskin tissue is often needed for the repair and can improve surgical options.
After surgery, families learn stent or catheter care, gentle hygiene, and how to spot problems like swelling or leakage. Short activity limits and diapering tips help protect the repair while it heals.
Your genes may have an impact on how drugs work for you
Medications for people with hypospadias—like pain control after surgery or antibiotics—can work differently depending on genes that affect drug breakdown and sensitivity. Pharmacogenetic testing isn’t routine, but doctors adjust doses based on age, size, recovery, and any known genetic factors.
Pharmacological treatments
Medicines do not correct hypospadias itself, but they can support surgery, reduce discomfort, and lower certain risks around the time of repair. Some treatments are used briefly before surgery to improve tissue size; others are used right after to help healing and comfort. Alongside drug therapy, surgery and careful follow-up remain important. Medicines aren’t intended to fix early symptoms of hypospadias, but they can make the process smoother and safer.
Short pre-surgery use of testosterone or dihydrotestosterone (DHT) cream can gently increase penile tissue size for repair. Your child’s urologist decides if this is needed and how long to use it. Mild skin redness can occur.
A short course of injections like testosterone enanthate or human chorionic gonadotropin (hCG) may be used to enlarge tissue before hypospadias surgery. This is specialist-guided and temporary. Possible short-term effects include oily skin or fussiness.
Trimethoprim–sulfamethoxazole or cephalexin may be prescribed while a catheter or stent is in place to lower urinary tract infection risk after hypospadias repair. Use only if advised and complete the course. Watch for rash or stomach upset.
Acetaminophen (paracetamol) and ibuprofen help ease post-op discomfort and swelling after hypospadias surgery. Occasionally, a brief opioid such as hydrocodone or morphine is used for stronger pain. Side effects, if they occur, can often be reduced by adjusting dose or timing.
Genetic influences
Family patterns suggest that genes contribute to the risk of hypospadias. The chance is higher when a close relative, such as a father or brother, was born with it, and studies point to gene changes that influence hormone signals and genital development before birth. Family history is one of the strongest clues to a genetic influence. Still, most hypospadias doesn’t trace to a single gene; the genetic causes of hypospadias are usually complex and may interact with factors during pregnancy. In a small number of cases, hypospadias appears along with chromosome differences or other birth differences, and doctors may suggest genetic testing or counseling. Sharing any family history of hypospadias with your child’s care team can help them advise whether genetic counseling makes sense for your family.
Is Hypospadias genetic?
Genetics play a meaningful role in hypospadias. Having a close relative affected raises risk, and multiple gene variations, along with hormone signaling differences, can contribute. Environmental factors during early pregnancy also interact with genetic susceptibility.
Pharmacogenetics—how genetics influence drug effects
Treatment for hypospadias is mainly surgical, but genetics can still shape parts of the plan. Alongside medical history and examination, genetic testing can highlight uncommon differences in sex development—such as changes in how the body responds to male hormones—that may guide timing of repair and whether a short course of pre‑operative testosterone or a similar hormone is likely to help.
Genes can also influence how children handle medicines used around surgery. Some inherited changes raise the risk of a rare anesthesia reaction called malignant hyperthermia, and a trait affecting an enzyme can make a muscle relaxant called succinylcholine last much longer than expected. Differences in drug‑processing genes may change how certain pain medicines work (for example, codeine or tramadol), so many teams avoid these in children and choose other options. Antibiotics and anti‑inflammatory medicines may be adjusted if there’s a known red blood cell enzyme condition called G6PD deficiency. If there’s a family history of anesthesia problems or unusual drug reactions, tell your surgical team; in select situations, pharmacogenetic testing for hypospadias surgery can add useful safety information.
Interactions with other conditions
Hypospadias often occurs alongside other conditions of the groin and urinary tract. The most common are undescended testicles, an inguinal hernia, or a hydrocele, and when hypospadias appears together with undescended testicles—especially on both sides—doctors may check for differences in sex development that can share hormone-related causes. Doctors call it a “comorbidity” when two conditions occur together. Some children with more severe hypospadias also have kidney or upper urinary tract differences, so an ultrasound may be suggested if the opening is very low or if there are other genital findings; this can also help explain early symptoms of hypospadias such as a weak or spraying urine stream. Urinary tract infections are not inevitable, but the risk can be a bit higher before repair in more severe cases or if there’s trouble emptying the bladder. Later on, having both hypospadias and a history of undescended testicles can affect fertility potential, so long‑term follow‑up with a urology team is helpful even after surgery.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
History
Throughout history, people have described boys born with the urine opening slightly lower than the tip of the penis, sometimes noticing a downward curve or a hooded foreskin during bathing or circumcision. Families and communities once noticed patterns, recalling uncles or cousins who needed surgery in childhood, even when there wasn’t a name for it. Midwives and surgeons wrote brief notes about difficulty directing the urine stream, or wet clothing after toileting, long before modern tools existed to examine the anatomy closely.
First described in the medical literature as a variation in the placement of the urethral opening, hypospadias was recorded by physicians in ancient Greece and later by medieval and Renaissance surgeons who attempted early repairs. Techniques were rudimentary, and outcomes varied. In the 19th and early 20th centuries, doctors began to distinguish milder cases from more complex ones, noting the position of the opening and the degree of curvature. With anesthesia and antisepsis, planned operations became safer, and surgical approaches gradually shifted from multi-stage procedures to more refined, single-stage repairs for many children.
In recent decades, knowledge has built on a long tradition of observation. Pediatric urologists developed standardized ways to describe hypospadias, which helped compare outcomes and improve techniques. Photographs, careful measurements, and long-term follow-up shaped modern practice, with a strong focus on preserving function and appearance and minimizing scarring. As ultrasound and newborn exams improved, more cases were identified early, often in the first hours of life.
Advances in genetics and developmental biology added another layer to the story. Researchers studied how hormones guide the formation of the urinary channel and foreskin in early pregnancy, and how small changes in these signals can shift where the opening ends up. While most cases of hypospadias happen without a clear cause, studies noted that it can run in families, and that both genetic factors and prenatal environment may play roles. This has guided counseling and encouraged careful evaluation for other features in more complex cases.
Today, the history of hypospadias reflects a move from descriptive accounts to individualized care. Surgeons use techniques tailored to the exact location of the opening and the tissue available, with timing that balances healing and growth, often between 6 and 18 months of age. Long-term follow-up has become part of the standard, acknowledging that needs can change from childhood through adolescence. Looking back helps explain why modern care emphasizes early diagnosis, experienced surgical teams, and support for families—building on centuries of observation to improve everyday life for those living with hypospadias.