Long-term severe diarrhea should consider the possibility of irritable bowel syndrome! I suggest you keep a good mood first, because this is not mainly caused by neurosis. I suggest you adjust the function of intestinal microorganisms, which may be effective. Recommend to eat Bifidobacterium aureus triple bacteria. Guidance: If it is short-term diarrhea, you can take Xieliting or norfloxacin capsules appropriately. Eat less cold and indigestible food and irritating food.