Burning sensation after defecation is considered to be caused by dietary factors, hemorrhoids, perianal inflammation and so on. 1. Dietary factors: such as eating too much spicy and stimulating food, which capsaicin and other substances will cause local stimulation of the anus, causing the symptoms of burning sensation during defecation. 2. Hemorrhoids: If the patient himself has hemorrhoids, after defecation because of hemorrhoids embedded local pain, swelling, may also appear burning sensation in the anus. 3. Perianal inflammation: such as sinusitis can lead to a feeling of swelling in the anal area, in the stool stimulation, but also easy to cause a burning sensation. Burning sensation after defecation after adjusting the diet, the symptoms still can not be relieved, should promptly consult a professional physician under the guidance of a clear cause, according to the cause of treatment.