Regardless of whether the patient has undergone anorectal surgery or not, when the stool gradually becomes thinner and narrower, and even thin stool cannot be passed smoothly, the patient may suffer from anorectal stenosis, and these patients are in unusual pain and often need to use corkage for years to solve the problem. In mild anorectal stenosis, the stool becomes thin or flattened, and sometimes the stool stays in the rectum for too long and ferments and produces gas, resulting in a feeling of distension in the anus, and individual patients have a painful sensation in the anus, which is sometimes mild and sometimes heavy. If you ensure enough vegetables and fruits, the stool will not be dry and the anorectal sensation will be slightly lighter. If the stool is on the dry side, it can cause anal pain or even blood in the stool due to increased abdominal pressure and forceful struggle, producing symptoms similar to anal fissure. Due to repeated attacks, there is often a burning sensation or foreign body sensation in the anus. Patients with moderate stenosis have difficulty in defecation and can only pass a small amount of loose stool. They often take oral laxatives and have more frequent bowel movements, sometimes accompanied by pus, blood and mucus, and some patients have no bowel movement and need regular enemas with cork or glycerin enemas to stimulate defecation. As the anorectum cannot be loosened continuously, coupled with the stimulation of feces, the anorectum is often congested and eroded, thus, the anorectum is down and pain is obvious, and the patient also shows mild incomplete intestinal obstruction such as not wanting to eat and drink, abdominal distension and weakness. In some patients with anal stenosis, frequent straining causes the hemorrhoid nucleus to turn out of the anus through the stenosis ring. In severe cases, the patient can only produce a little thin stool or even a little fecal juice every day, with heavy pain in the anorectum, abdominal distension, poor appetite, wasting, and chronic colonic obstruction. In some cases, they are restless, anxious and depressed.