Why so clumsy?

A person who appears to be uncoordinated all the time may be suffering from ataxia, which means muscle incoordination.

MY relative is the most uncoordinated person I know. She cannot walk properly. She stumbles over her own feet sometimes, and she has difficulty walking in a straight line. She is very clumsy. She cannot even wear her clothes properly or button them up correctly. We always tease her, until my mother suggested she might have a medical condition.