The main reason why prostatitis anal swelling is caused by inflammation stimulation and compression of the nerves. 1. Inflammation stimulation: because the prostate is close to the rectum, close to the anus, so the patient’s prostate will stimulate the anus when inflammation occurs, resulting in anal swelling, and may also radiate to the pubic area, resulting in perineal area swelling. 2. compression of nerves: due to the short length of the prostate from the anus, if the prostate gland is swollen more obvious, the nerves can be compressed, and thus the pelvic floor innervation area pain, anal swelling feeling. In addition, patients with prostatitis anal swelling are advised to go to the hospital in time and follow the doctor’s instructions for standardized treatment. It is recommended that patients usually avoid sedentary, late-night behavior, but also try to avoid eating stimulating food, so as not to cause more serious effects.