There are many reasons for the painful sensation in the anus, which should be combined with medical history and physical examination, and if necessary, anoscopy and colonoscopy can be performed to clarify its cause. First, if there is fecal retention, such as long-term constipation or obstruction of fecal discharge, which can lead to the formation of fecal stones, thus forming rectal fecal retention, can make the anorectal painful sensation, this situation should be promptly performed enema treatment. The second, the painful sensation around the anus may also be hemorrhoids, such as mixed hemorrhoids, is the varicose vein mass, diet a lot of stimulating food or a lot of alcohol can lead to hemorrhoid vein congestion, stasis, swelling, which leads to painful sensation in the anus. The third, there may be trauma, foreign body invasion into the anorectum thus leading to injury, infection, sometimes in the anus will also produce a painful feeling. Fourth, if there is a perianal abscess, such as an anal gland infection that spreads along the skin of the anal canal to form an abscess, it can also lead to a feeling of pain.