Salt water sitz baths are usually ineffective for anal fissures, and patients are advised to use medications such as erythromycin ointment. Salt water sitz bath for anal fissure is usually ineffective, but on the contrary, it will produce strong irritation to the broken mucous membrane, aggravating the edema and pain sensation. The antibacterial and sterilizing effect of saline is also very limited and cannot effectively control or prevent infection, so patients are not recommended to use saline sitz bath. Patients can use medication such as erythromycin ointment, nitroglycerin ointment or lactulose under the guidance of a doctor. Patients with anal fissure should pay attention to keep the bowels open in daily life, try not to force defecation, drink more water, eat more fresh vegetables and fruits, such as spinach, bananas and other foods rich in dietary fiber. At the same time, pay attention to not sitting for a long time, to do more exercise, enhance immunity, promote wound healing. If the anal fissure recurrence, difficult to heal, feasible anal fissure excision and other surgical treatment. It is recommended that patients with anal fissure should go to the hospital in time to check, clear condition, reasonable treatment under the guidance of the doctor, follow the doctor’s instructions, pay attention to do not eat spicy and stimulating food.