Diarrhea with blood is mainly due to the following points: 1, intestinal infection, mainly due to unclean diet caused by a large number of bacteria, viruses and other pathogens into the intestinal tract, pathogens into the intestinal tract resulting in intestinal mucosa congestion, edema and damage to the intestinal mucosa, when the intestinal mucosa damage is serious then there will be blood with thin stools. In the treatment should be given anti-infective drugs, such as levofloxacin, gentamicin, cefoperazone, etc., if there is no fever, chills and other symptoms of systemic toxicity, the need to give intestinal mucosal protective agents, such as montelukast, etc. 2, chronic colitis, mainly seen in ulcerative colitis, Crohn’s disease, etc., non-specific inflammation caused by enteritis, mainly manifested by multiple ulcers in the colon and intestinal mucosa bleeding, so the stool The stools are bloody and loose. The treatment mainly gives steroid hormone, such as dexamethasone, hydrocortisone, etc., salicylic acid drugs, such as salazosulfapyridine, etc. 3, intestinal tumors, mainly malignant tumors, mainly manifested as a change in the nature of bowel movements, due to the erosion of intestinal mucosa by tumor cells, resulting in intestinal mucosal bleeding, so the phenomenon of blood in the stool. 4, hemorrhoids, mainly due to rectal varicose veins, when defecation anal Sphincter muscle contraction, resulting in blood vessels rupture and diarrhea with blood.