Eat a meal on the diarrhea has three major causes: first, may be caused by acute gastroenteritis, flat is eating unclean food or catching cold leading to infection, diarrhea after eating, you can eat antibiotics and probiotics combined treatment. Second, caused by irritable bowel syndrome, mainly mental problems, stomach pain after eating, after defecation will be better, this belongs to the functional disease, you can eat pivoxyl bromide, ionic antagonists, etc., can inhibit the smooth muscle spasm of the intestine. Third, intestinal bacterial dysbiosis, the need to use probiotic drugs to regulate intestinal flora, improve the intestinal environment of the drug can be used in combination, but also can be used alone, such as the whole intestinal life, Pepcid, gold bifidus and bacillus subtilis bifidus tablets, etc., these drugs should be spaced more than two hours at a time can be used at the same time with antibiotics.