The burning sensation of anal distension may be related to physiological factors, such as poor dietary habits; it may also be related to pathological factors, such as anal fissure, hemorrhoids and so on. 1. Physiological factors: if the patient has long-term bad dietary habits, such as frequent consumption of spicy, stimulating food, defecation capsaicin stimulation of perianal skin mucosa, will lead to the symptoms of the patient’s anal burning sensation. 2. Pathological factors: (1) anal fissure: due to long-term constipation, when defecation, a force, it will lead to the perianal skin or anal canal tear damage, thus causing the symptoms of anal swelling and burning sensation. (2) hemorrhoids: patients with hemorrhoids, hard defecation, dry feces friction hemorrhoidal mass caused by damage, this time the patient will also appear in the anus symptoms of burning sensation. If the patient has the symptom of anal swelling and burning sensation, it is recommended to go to the hospital for standardized treatment in time to avoid delaying the condition.