I also have a problem after eating, although it is somewhat different. My nose runs, especially after a large meal, and I can go through many tissues. This began after moving from Cleveland, Ohio to Silver Spring, MD in 1975. I have found that eating smaller portions and spacing things out more is helpful, such as waiting after dinner before eating a bowl of cut-up fruit and yogurt for dessert. I have a borderline case of diabetes that is well controlled without medication. A doctor once told me that he could prescribe something that could inhibit this reaction so that it wouldn't occur when I went out to dinner, but I never asked for the prescription. I am wondering whether seeing an endocrinologist might be helpful to you.