Anal fissures are longitudinal fissures of the entire skin of the anal canal, or the formation of a poke-shaped ulcer. The main clinical manifestations are pain, blood in the stool, and constipation. Most anal fissures occur on the posterior side of the anal canal, a few on the anterior side, both sides are extremely rare, single or multiple, and those occurring on the anterior side are mostly seen in women. The incidence is about 2.43%, accounting for 4.12% of anal diseases. It is more common in young and middle-aged people, and more women than men. In Chinese medicine, they are called pulsating hemorrhoids, hooked hemorrhoids, cleft hemorrhoids, etc. Clinical manifestations: 1. Periodic pain: Periodic anal pain is a characteristic manifestation of chronic anal fissure. It is characterized by the passage of feces through the anal canal during defecation, dilatation of the anal canal, stimulation of fissure ulcers, and tear-like pain or knife-like pain in the anus, called defecation pain. The pain is relieved or relieved a few minutes after defecation, which is called intermittent pain. Then, the pain is severe due to the spasmodic contraction of the sphincter muscle, lasting from tens of minutes to several hours, or even until the next bowel movement, which is called sphincter spasm pain. In severe cases, urination, coughing and sneezing can cause painful cycles to occur. However, not every patient with chronic anal fissures presents with the typical cycle of pain. Acute anal fissures usually only show pain during stool, which is relieved soon afterwards. 2. Blood in the stool: blood dripping from the stool or blood on the stool paper, bright red in color, more or less in amount. Constipation: Constipation is often the initial cause of anal fissure, and later patients are often afraid to defecate due to pain. 4, wet and itchy: fissure secretions out of the anus damp, stimulating the perianal skin and cause itching, and over time can be followed by perianal eczema.