Many people first notice acquired ataxia when everyday movements start to feel “off,” like suddenly stumbling on flat ground, veering while walking, or having trouble buttoning a shirt or writing neatly. You might also catch early warning signs such as a shaky, wide-based walk, slurred or slowed speech, new hand tremor, or dizziness and blurrier, jumpy vision—especially after an illness, a head injury, new medication, alcohol use, or toxin exposure. If these first signs of acquired ataxia appear over hours to days, or come with severe headache, double vision, trouble swallowing, or weakness on one side, it’s a medical emergency and you should seek urgent care.