What causes sudden diarrhea and bleeding?

Sudden diarrhea and bleeding are considered to be related to intestinal mucosal bleeding. Patients with diarrhea will cause edema of intestinal mucosa. When feces stimulate intestinal mucosa, it will cause capillary rupture of intestinal mucosa, thus causing bleeding symptoms. However, it cannot be ruled out that it is caused by digestive system diseases, such as peptic ulcer, acute gastroenteritis, Crohn's disease, intestinal tuberculosis, ulcerative colitis, rectal cancer, colon cancer, etc. In addition, if the patient has hemorrhoids, diarrhea will cause irritation to hemorrhoids, which will also lead to bleeding during defecation. It is recommended that the patient go to the hospital for treatment. If it is caused by hemorrhoids, it can be treated with topical hemorrhoids ointment.