My father is 93 and recently returned from a 3 week visit to the Philippines. According to his doctor he returned with a sinus infection and was treated with antibiotics, however his ear is hurting, his balance is bad/off and food has no taste to him. Water does not even taste good to him. He has lost 5 lbs. He is approx. 5 5 and very small boned. He is Caucasian. His doctor is referring him to a ENT. What do you think could cause this lack of balance, loss of taste, ear ache, and general feeling down.