Anal fissure is a disease characterized by periodic anal pain due to spasm of the anal sphincter, i.e., paroxysmal cutting pain during defecation, relieved for a few minutes after defecation, followed by continuous severe pain for several hours, accompanied by habitual constipation and bleeding during defecation. As you can see, the biggest pain that anal fissures bring to patients is the long duration of pain, and many patients with anal fissures have constipation, constipation makes the patient more painful when defecating, so they are reluctant to defecate, forcing stool, resulting in more serious constipation, and the more serious anal fissures. If this vicious cycle continues for a long time, anal fissures will only get worse and worse. What are the symptoms of anal fissure? The typical clinical manifestations of anal fissure are pain, constipation and blood in stool. 1, pain: anal fissure can cause periodic pain due to defecation, which is the main symptom of anal fissure. When the patient defecates, the fecal mass stimulates the nerve endings of the ulcer surface and immediately feels burning pain in the anus, the muscle relaxes and the pain is relieved. However, when defecating again, pain occurs again. 2. Constipation: Reluctance to defecate due to anal pain causes constipation over time, and the stool becomes drier and harder, which can aggravate the fissure, forming a vicious circle. 3. Blood in the stool: A small amount of fresh blood is often seen on the surface of the stool or on the stool paper when defecating, or drops of fresh blood. Hemorrhage is rare. 4, other: such as itching, secretions, diarrhea, etc. Hazards of anal fissure 1, leading to anal papillitis: the upper end of the ulcer is connected to the tooth line, and the inflammation spreads, often causing anal sinusitis and papillitis, and finally forming anal papillomegaly. 2. Causes anal sinusitis: The infection spreads from the anal sinus, forming small abscesses under the skin of the anal canal, which break down and generate ulcers. Sometimes there is anal fissure first, and then it causes anal sinusitis. 3.Screw-shaped ulcer: Anal canal skin fissure, after infection, the formation of ulcers, and further deterioration. 4.Anal comb sclerosis: i.e. thickening and hardening of the pectineal membrane, forming a comb sclerosis, which exposes the base of the ulcer and prevents the sphincter from stretching and affects the healing of the ulcer. 5, latent fistula: the base of the anal sinus, there is commonly a fistula with ulcers, which is due to the infection and purulence of the anal sinus and the formation of small abscesses breaking. 6, resulting in fissured hemorrhoids: the skin at the lower end of the fissure is altered by inflammation, and the superficial venous and lymphatic return is obstructed, causing edema and tissue hyperplasia, forming connective tissue external hemorrhoids, also known as sentinel hemorrhoids.