Anal fissure has become a very common anorectal disease in life. Pain is the main symptom of anal fissure, which brings untold suffering to the patient and makes him or her uncomfortable and painful. Pain is the first message that most patients feel. Causes of anal fissure pain: The main cause of severe pain in anal fissures is the stimulation of nerve endings in the fissure during defecation, which immediately causes burning and cutting pain in the anus, resulting in spasmodic contraction of the anal sphincter, leading to persistent pain. Then, as time passes, the sphincter gradually becomes fatigued and relaxes, and the pain then decreases and gradually disappears. This is called “a cycle of pain” in anal fissure pain symptoms. In addition, not only can defecation cause severe pain in anal fissures, but coughing, sneezing, and urination can also cause this pain cycle. Characteristics of anal fissure pain: 1. When there is an intention to defecate, the anus is stretched and the pain starts. When defecating, the feces flushes out of the fissure and immediately feels burning or knife-like pain in the anus, called fecal pain. The degree of pain varies with the size and depth of the fissure. The pain during this period often lasts from half an hour to several hours, making people restless and very painful. The pain stops or decreases a few minutes or up to 10 minutes after defecation, which is called intermittent period. Fourth, when the sphincter muscle spasm and fatigue, the pain only gradually stop. This is a cycle of pain, from defecation a pain a relief a painful process. V. Due to the contraction of the anal sphincter spasm, the pain is again felt as severe fissure pain. Sixth, afterwards, another painful cycle can be caused by defecation or sneezing, coughing, urination, etc. The pain is more pronounced when the anal fissure is combined with an infection. The pain brought by anal fissure is unbearable, and we don’t want to be tormented by anal fissure pain, we can only do all the prevention in advance to stop anal fissure from happening.