you didn't say if he has hepatitis or not. this is a hepatitis forum. he should be seen for this condition, there are no doctors here and what you describe could have many causes, he many need to see a neurologist to obtain a diagnosis, certainly he will need tests to determine what may be causing his symptoms. he could start by seeing a primary care physician to obtain the referral to a specialist. hope all works out for you.
Yeah my dad has been looking at me shaking his head from side to side for the better part of 50 years now.