After the bowel movement of the anus hot and spicy considerations and food stimulation, stool dryness, anal fissure and other reasons. 1. Food stimulation: when eating a lot of spicy and irritating food such as chili peppers and peppercorns, it can lead to stimulation of the anal canal during defecation, thus leading to hot and spicy symptoms during defecation. 2. Stool dryness: for example, when intestinal inflammation occurs, it can lead to the stool in the intestinal tract stays too long, which leads to the absorption of stool water and become dry. When defecating, it will rub and damage the skin of the anal canal, resulting in hot and painful symptoms in the anus. 3. Anal fissure: there is usually a history of habitual constipation. Constipated patients every time they defecate, can lead to the formation of perianal fissure or the aggravation of the original fissure, and feces will be on the ulcerated surface of the nerve endings to produce stimulation, which leads to defecation after the anus appear hot and spicy sensation or burning-like pain. When there is a burning sensation in the anus after defecation, it is recommended that you should eat a light diet and eat less or no spicy stimulating food. If the symptoms are serious, it is recommended to go to the hospital for examination, to clarify the cause of the disease, to carry out targeted treatment, to avoid delaying the condition.