The main causes of anal fissure during breastfeeding are irregular work and rest, mental tension and anxiety, constipation, etc. The symptoms can be improved and the pain relieved through general treatment and medication. During breastfeeding, irregular work and rest caused by staying up late for a long time, high mental tension and anxiety, constipation caused by irregular diet and other factors will induce anal fissure. Anal fissure will cause pain due to the fissure damage of the anal canal skin, which needs timely treatment. It is recommended that in life regular routine, avoid staying up late, drink more water, eat more food rich in dietary fiber, avoid tension and anxiety, relax the mind, warm water sitz bath and other measures to gradually ease the discomfort. When constipation is serious, you can use drugs such as Kefir to promote defecation under the guidance of a doctor; when in pain, you can apply topical lidocaine gel to relieve pain. By actively cooperating with the doctor to receive standardized treatment, can significantly improve the prognosis of the disease, drug adverse reactions recommended to consult a doctor, drug allergy is prohibited.