For diarrhea, consider the association with acute and chronic enteritis, food poisoning, irritable bowel syndrome, and bowel cancer. The harm of long-term diarrhea in men may be malnutrition, anemia, water electrolyte disorders, etc.. 1. Malnutrition: long-term diarrhea may cause a large amount of protein in the body in the intestinal tract is lost, some patients may have hypoproteinemia and other malnutrition. 2. Anemia: some patients may have blood in the stool, long-term diarrhea is easy to cause anemia, when the patient may have a large number of red blood cells in the stool or fecal occult blood positive, iron deficiency anemia. 3. Hydroelectrolyte disorders: Because diarrhea may cause poor appetite, resulting in less water and food, electrolytes are discharged with the stool, and electrolyte disorders such as low sodium and low potassium may occur. The causes of diarrhea are many, if the patient has diarrhea for a long time, it is recommended to go to the hospital as soon as possible for diagnosis and treatment, and usually should have a light diet.