Diarrhea when checking the blood routine, stool routine are normal, may be related to gastrointestinal dysfunction, enteritis, irritable bowel syndrome, etc., can be treated by adjusting the diet, medication, rehydration methods. 1. Gastrointestinal dysfunction: For patients with diarrhea, diet can be adjusted. Avoid spicy, stimulating, too cold and too hot food, and reduce high protein food, such as milk, soybean milk, eggs and so on. When the elderly or children have diarrhea, when dehydration occurs, rehydration therapy can also be carried out. 2. Enteritis: If the patient has diarrhea due to bacterial infection, appropriate medications such as ceftriaxone and levofloxacin can be taken under the guidance of a medical professional. 3. Irritable bowel syndrome: when diarrhea occurs in irritable bowel syndrome, antidiarrheal drugs can be given for treatment, such as montelukast. The above drugs should be used under the guidance of professional physicians. If the patient’s diarrhea symptoms are more serious, we must actively seek medical treatment, under the guidance of professional physicians.