Frequent farting and burning sensation in the anus may be caused by improper diet, hemorrhoids, perianal inflammation and other diseases. 1. Improper diet: when taking too much spicy stimulation, cold and gas-producing food, capsaicin in chili peppers stimulate the anus and intestinal gas production increased frequent farting and burning sensation in the anus symptoms. 2. Hemorrhoids: the lower rectal veins or perianal congestion and bruising may appear enlarged hemorrhoidal nuclei leading to poor anal closure, frequent farting and burning sensation in the anus symptoms. 3. Perianal inflammation: When there is inflammation of the anus or lower rectum, the inflammation stimulates the perianal area and intestinal flora imbalance, resulting in frequent farting and burning sensation in the anus. If the symptoms of frequent farting and burning sensation in the anus appear, you need to go to the hospital for further examination of colonoscopy, abdominal ultrasound and other items to find the cause.