Perianal fissure is mostly considered as a symptom of anal fissure, which can be self-healed by changing lifestyle habits and taking a sitz bath in milder cases, while those with more severe symptoms need to undergo surgical treatment. Anal fissure is a small ulcer formed by anal canal skin fissure, mostly due to long-term constipation, fecal dryness and other causes of defecation caused by excessive mechanical damage, can be seen in the skin around the anus fissure. For those with mild symptoms, the effect of self-healing can be achieved through lifestyle changes such as eating more fruits and vegetables, drinking water, and keeping bowel movements clear, combined with warm water sitz baths. For the more serious symptoms, long lasting anal fissure, especially when complicated by perianal abscess, it should be surgically treated, such as drainage through skin incision. If the patient’s perianal fissure symptoms are serious, or the symptoms persist and do not get better, they should go to the hospital in time for treatment.