Occasional bleeding from stools and gastrointestinal allergies can be treated with medication, with surgery required to stop bleeding and relieve symptoms in severe cases of anal fissure bleeding in old age. Occasional bleeding in the stool of the aged anal fissure can be applied locally with nitroglycerin ointment, lidocaine gel, diltiazem ointment, which can stop bleeding and promote healing of the wound, and gastrointestinal sensitivity can be relieved by taking medications such as domperidone, omeprazole, pantoprazole, etc, which can increase the protection of the stomach and relieve the gastrointestinal sensitivity. When the bleeding of old anal fissure is serious, and the bleeding cannot be stopped by medication, surgical excision is needed to remove the diseased tissue and cure the anal fissure. The above drugs need to be used under the guidance of a doctor, not blindly use their own medication to avoid aggravation of the condition, pay attention to a light diet in daily life, avoid spicy and stimulating food, quit smoking and drinking to reduce stimulation.