Anal sphincter spasm is an outlet obstruction type of constipation caused by the absence of ganglion cells of the intestinal wall, holding stool for a long time, and vasoconstriction.
The movement of intestinal smooth muscle is regulated by the nerve innervation of the intestinal wall. When the ganglion cells of the intestinal wall are absent, the intestinal nerve dysfunction leads to rectal weakness, which then causes primary anal sphincter spasm. As a result, feces cannot be discharged from the anus smoothly.
The accumulation of feces to a certain amount will stimulate the nerves and produce the urge to poop, such as ignoring the urge to poop for a long time, resulting in excessive accumulation of feces in the rectum, will stimulate the spasm of the anal sphincter, which will reflexively dilate the rectum and reduce the pressure. In addition, the anal blood vessels are stimulated by cold contraction spasm, may also lead to anal sphincter spasm.
Therefore, it is recommended that people should develop a good habit of defecation, do not hold their stools, and prevent dry stools and constipation. After defecation, pay attention to cleaning the anus, keep clean and warm, etc.. If you have perianal discomfort with defecation difficulties, go to the hospital as soon as possible for examination, to clarify the cause of the disease, and give appropriate treatment.