Diarrhea after consumming food including eggs or milk, or mayo.what could be the reason?

Doctor can evaluate: If a person is having trouble with whole milk, regular mayo, whole eggs, etc... She may have trouble digesting the oils and fats in them. So, she should be evaluated by her primary care doctor or a G.I. Doctor to check for gall bladder problems and pancreas problems, because those organs need to be working well in order for a person to digest fats. Some people also have lactose intolerance.