The painful sensation in the anal area after drinking alcohol is mainly caused by lesions that have occurred in the anal area, most commonly hemorrhoids and anal fissures. The reason for this phenomenon is that hemorrhoids are formed because of the obstruction of venous blood flow around the anus, and drinking alcohol speeds up the blood circulation, thus stimulating the formation of venous blood masses or thrombi around the anus, which in turn causes pain in the anus after drinking. This causes pain in the anus after drinking. Another cause is anal fissure, which is mainly manifested by a large number of fissures or small cracks in the rectal canal and the muscles of the anus, which can easily lead to redness, swelling, pain and bleeding due to the stimulation of feces, especially under the stimulation of alcohol, the fissures that have already appeared can cause increased pain.