I Can Eat The Slightest Of Meals And Feel Very

I can eat the slightest of meals and feel very bloated. For instance, today for bfast i had pineapple, very bloated until about an hour before lunch. For lunch i had one trip to the salad bar, iceberg lettuce, tomatoes, olives and cheese with 1000 island dressing, med size salad at most, very bloated again. I'm 47 yr old male in good physical condition. 6'1' wiegh 220 lbs.