Burning in the anus includes the following clinical causes: 1. inflammatory lesions of the anus and rectum: this is the most common cause, including perianal inflammation or perianal abscess, resulting in local redness, swelling, heat and pain, especially perianal abscess, which can manifest as a burning sensation in the anus when the infection is more serious, accompanied by a generalized fever, sometimes with a body temperature of 38-39°C. 2. anal fissure or rectal polyp In this case, the inflammatory fluid oozing out of the anus due to long-term repeated irritation will cause a hot sensation in the anus of the patient. Therefore, if you have a burning sensation in the anus, you must go to the hospital in time for proctological examination and anoscopy to find the exact cause of the burning, and then carry out systematic and standardized treatment according to the cause.