Bleeding rectal ulcers can usually be treated with thrombin and aminosalicylic acid preparations under doctor’s supervision. Bleeding rectal ulcers may be caused by bacterial infection and irregular diet. 1. Bacterial infection: rectal ulcer bleeding may be caused by bacterial infection, there may be high fever, abdominal pain, gastrointestinal ulcer bleeding and other symptoms, can be under the guidance of the doctor to take thrombin, mesalazine and other drugs for treatment, allergy patients are prohibited. 2. Irregular diet: Irregular diet may cause rectal dysfunction leading to rectal ulcer bleeding, may appear blood in stool, abdominal pain and other symptoms. It can be treated with deaminosalicylic acid preparation, prednisone and other medicines under doctor’s guidance, and it is forbidden for patients with angina pectoris. It is recommended that patients with the above symptoms should go to the hospital in time for examination and treatment, do not self-medication in order to avoid delaying the condition of the danger.