Try not to eat any gassy veggies (i.e. cauliflower, broccoli...) and no acidic fruits (i.e. orange, grapefuit...) Also try to avoid tomatoes. Some people have problems with digesting meat (protein), such as myself, others have problems with digesting breads and pastas. You may have to eliminate foods gradually to find out what makes you sick and then add back in the ones that you digest easily.