The first reason is to analyze the causes: first, it may be fecal retention that leads to anal swelling and discomfort, which may be caused by eating high-fat food often, leading to constipation and mucus on the surface of the feces, which can lead to poor stool discharge. Second, if it is export obstruction type constipation, such as rectal intussusception, the loose mucosa in the stimulation of stool can easily lead to anal blockage, in the increase in abdominal pressure or sedentary, squatting when the loose mucosa blockage of the anus, causing anal drop. If the symptoms are serious, you should promptly undergo surgical treatment, such as PPH surgery, i.e. suprahemorrhoidal mucosal circumferential stapling, which can remove the loose mucosa and relieve the symptoms of anal swelling.