Hi he may have a middle ear infection.If so he will have to take infection drugs for about one month.Also he will need drugs to cause draining to unclogged the sinus and tubes that go in to ears.He also could have a bad thyroid problem.Also a possbile hormone imbalance.Does he have headaches also.He needs to have a brain scan asap.This may not be a huge problem nothing that could be life threating,but I would have it look at futher asap!Good luck.
How old is he? also is he walking with his feet spreed apart more than normal? You may want to get an MRI and have a neurosurgon look at it.He could be suffering from NPH (normal pressure hydrocephilus) Friend of my had it and after 10,000 in Doctor bills and a bunch of i don't knows a Doctor suggested it might be NPH although he didn't have all the symptons a neurosurgon said it was.A simple operation in one day out the next put himself back to normal.Good luck and I hope y'all find the problem.Oh by the way my friend was 42 yrs old.
my mother has verdago and the doctor gave her meds, and it stoped, also blood pressure can do it as well i would go to a specialist for head nose throat, or an eye doctor, possibly, but they have meds that stop it!!! eventuall it will pass with the meds, she doesn't have it but once a year now....sorry