My husband had gastric by-pass 15 years ago. He is 70 years old. He lost 90 pounds 15 years ago and Has re-gained 70 pounds over the years. He now (past 3 months) cannot eat a normal amount of Food at one time. He immediately feels full and cannot consume much volume of food. He has Not lost any weight. He feels tired every afternoon and takes. 1-2 hour naps most afternoons. His IM doctor says he is fine and all blood tests are good. (He has diabetes). Could there be Something wrong in his stomach to cause him to be full with very little volume of food?