Normal people generally have a bowel movement once a day, and individuals have 2-3 bowel movements per day or once every 2-3 days, with normal stool properties and an average weight of 150-200g of stool per day, containing 60%-75% of water. Diarrhea is a common symptom, which means that the number of bowel movements significantly exceeds the usual frequency, the stool is thin and watery, and the daily volume of stool exceeds 200g, or contains undigested food or pus, blood or mucus. Diarrhea is often accompanied by a feeling of urgency to defecate, abdominal pain, and anal swelling. Anal burning and other symptoms. Diarrhea is divided into two categories, acute and chronic. Acute diarrhea has a rapid onset and lasts for 2 to 3 weeks. Chronic diarrhea refers to recurrent diarrhea with a duration of more than two months or an interval of 2 to 4 weeks. Diarrhea belongs to the categories of “diarrhea” and “downward diarrhea” in Chinese medicine. Chinese medicine generally refers to loose stools as “leakage” and watery stools as “diarrhea”. Clinically, diarrhea can be divided into the following types of evidence: 1, damp-heat conjunctive: rapid onset, diarrhea like injection, diarrhea out of yellow watery stool or with mucus, fishy odor, intestinal tinnitus, burning pain in the anus, dry mouth and thirst without drinking, red urine, red tongue, yellow greasy coating, smooth pulse. 2, cold dampness in the obstruction: clear stool, abdominal pain, like warmth, like to press, water and grain do not change, do not think about eating, heavy and sleepy limbs, urine clear and long, light tongue, white greasy coating, moist or slow pulse. 3, food stagnation: abdominal pain that diarrhea, diarrhea pain reduction, a short time again painful diarrhea, stool sticky, foul-smelling, bloating, belching and swallowing acid, abdominal fullness anorexia, light tongue, moss greasy, pulse string smooth. 4, liver depression and spleen deficiency: abdominal pain before diarrhea, indigestible food under diarrhea, pain does not decrease or increase after diarrhea, triggered by mental stimulation, loss of appetite, belching, light tongue, white fur, string pulse. 5.Spleen qi deficiency: thin stools, aggravated by eating cold, greasy or indigestible food, vague pain in the abdomen, warmth and pressure, loss of appetite, withered face, sleepy limbs, light fat tongue, white fur, sunken and weak pulse. If it belongs to the lowering of the middle qi, it can be accompanied by anal swelling and prolapse. 6, Kidney Yang deficiency: abdominal pain and diarrhea before dawn, scanty stool, unheated extremities, soreness and weakness of the waist and knees, clear and long urine, nocturnal urination, light fat tongue with teeth marks, sunken and weak pulse. 7.Water drink internal stoppage: thin stool like water, accompanied by abdominal intestinal sound, with the sound of water vibration, or thirst and desire to drink, saliva in the mouth, vomiting, light red tongue, slippery coating, smooth pulse. 8, heat knot byflow: diarrhea with yellow smelly thin water or pure clear thin water, abdominal pain around the umbilicus, abdominal refusal to press, fullness and stuffiness of the stomach and epigastrium, loss of appetite, short red urine, red tongue, yellow greasy coating, smooth pulse. 9, Yin deficiency diarrhea: loose and unformed stools, dry mouth and throat, irritable heat in the heart, red tongue, little or no moss, thin or fine pulse. Insufficient lung yin can be seen in the urgency of defecation, chest tightness and slight cough; spleen yin deficiency can be seen in loose stools, sticky and unpleasant, not much stool, light red lips and cheeks, burning palms, dry mouth and desire to drink; stomach yin deficiency can be seen in the dawn that the intestines sound diarrhea, the amount of dull, dry lips, thirsty desire to drink, irritable heart; kidney yin deficiency can be seen in the early morning before the toilet for more, less, thin and sticky or thick, abdominal pain, waist and knee weakness, seminal emission. 10, phlegm-damp diarrhea: diarrhea in the stool, or as thin saliva, or as phlegm saliva, or as foamy, or with mucus such as snot, with cough, chest tightness and asthma, or see coughing phlegm saliva when diarrhea is reduced, or coughing phlegm saliva and diarrhea, or intestinal tinnitus, mostly without pus and blood stool thick and greasy tongue coating, light fat tongue, smooth pulse. 11, mixed cold and heat: diarrhea, unpleasant stool, abdominal pain, warmth and pressure, tiredness and coldness, thirst without drinking or hot drinks, light yellow urine, red or light red tongue, thin yellow moss, thin and slow or moist pulse.