Anal sphincter spasm may be due to physiological reasons or pathological factors such as anal fissure or low blood calcium. Usually it can be treated by medication or physical therapy such as expanding the anus and pressing the Changqiang acupoint. 1. Physiological reasons: the anal sphincter is under tension for a long time, which can easily cause spasm of the anal sphincter. Usually, you can relax the sphincter by lifting the anus or putting your fingers into the anus and expanding the anus to improve the symptoms. 2. Pathological causes: (1) anal fissure: patients with anal fissure have inflammation due to the rupture of the tissues around the anus, and the sphincter muscle is stimulated by the inflammation for a long time, resulting in spasm of the anal sphincter muscle. Usually you can rub erythromycin ointment, nitroglycerin ointment and other medicines in the anal fissure area under the guidance of the doctor to alleviate the symptoms, and in serious cases, you can undergo surgery to remove the anal fissure. (2) Low blood calcium: low blood calcium concentration in patients due to low blood calcium ions, calcium ion deficiency is very easy to make neuromuscular excitability increased, resulting in anal sphincter spasms, need to be given to supplement calcium symptomatic treatment. Oral calcium gluconate solution can be taken under doctor’s advice to improve the symptoms by increasing the calcium ion concentration in the blood and decreasing the neuromuscular excitability. For patients with anal sphincter spasm, it is recommended to go to the hospital as soon as possible and delaying the condition is not recommended.