If anal fissure is complicated by perianal abscess, erythromycin ointment can be used for anti-infection treatment. If the simple anal fissure does not need to use erythromycin ointment treatment, you can use nitroglycerin ointment, lidocaine gel paste and other drugs. If you need to use drugs, you need to use under the guidance of a doctor. Erythromycin ointment is a macrolide antibiotic, mainly used for the treatment of suppurative skin diseases and small area burns, ulcer surface infection. If the anal fissure patient is complicated by infected perianal abscess, erythromycin ointment can be used for anti-infection treatment. In case of simple anal fissure patients are advised to use nitroglycerin ointment, lidocaine gel paste and other drugs to relieve symptoms. This product can also be used to improve the symptoms of constipation with 1:5000 potassium permanganate warm water sitz bath after defecation or oral laxatives. Surgery may be considered for severe cases. Allergic to this product is prohibited, allergic to people with caution. Pregnant and lactating women should be used under the supervision of a physician. If you need to use drugs, please use under the guidance of a doctor.