 [ Symptoms ] are moles in an area that is not exposed to sun is it common that you will find that they are precancerous [ Disease ] i recommend you see a registered dietitian who specializes in gastrointestinal disorders he or she can help you figure out which foods may be exasperating your symptoms and how to maintain weight while getting adequate nutrition you can find a dietitian in your area at eatright org for more on diet with ibs see this webmd article good luck