First, there are particularly many reasons for anal opening burning, especially for patients with hemorrhoids. Hemorrhoids are the varicose vein masses, which are prone to varicose after prolonged sedentary, sedentary as well as spicy food as well as alcoholic stimulation, which can easily produce burning sensation at the anal opening. Second, if there is a fungal infection at the anal opening, such as eczema, this may lead to fissures in the skin around the anal canal, which can easily secrete some mucus, resulting in a burning sensation at the anal opening and a tingling sensation. Thirdly, if there is an infection at the anal opening such as an abscess, it will also lead to local redness and swelling, which can be clarified by perianal ultrasound. So the causes of burning at the anal opening are particularly numerous, and may be anal fissures, perianal eczema, and perianal abscesses.