The symptoms of anal sphincter spasm are mainly manifested as the following, firstly, painless defecation and difficulty in defecation, or even bleeding in defecation, and there may also be a feeling of less smooth defecation process, and some patients have a sore and uncomfortable feeling in the pubic area. On rectal and anal canal finger examination, there may be pressure pain in the elasticity of the internal sphincter, increased pressure in the anal canal, and even difficulty in entering the anal canal with the fingertip. With more fecal accumulation in the rectum, the anal sphincter is prone to spasm, and the so-called spasm is a state of continuous contraction of the anal area. Secondly, if stimulated by inflammation and so on, the anal canal will continue to be in a state of spasm, and the spasm of the anal sphincter will make the anal canal narrow and difficult to defecate, and at the same time, cause strong pain in the anal canal, and when the stool is dry, it is easy to make the anal canal skin rupture, and if it is not treated in time, it can form anal fissure.