Anal swelling, burning sensation, mainly caused by a variety of rectal, anal diseases, including prolapse type of anal diseases, inflammatory lesions in the rectum, other compressive diseases. First of all, the most common is the prolapse of the anal region of the disease, including rectal polyps, hemorrhoids, will produce due to hemorrhoids, polyps prolapse caused by anal swelling feeling. Secondly, consider inflammatory lesions in the rectum, including sinusitis, colitis, proctitis, etc., will be due to inflammation stimulation of the dentate line area, resulting in burning and swelling in the anal area. Once again, the main compression diseases, especially in women, uterine displacement, uterine prolapse, resulting in rectal, anal compression and swelling, other surgical stimulation and their own nerve dysfunction can also be caused.