Anal swelling can be caused by prostatitis or prostate enlargement. Prostatitis tends to occur in young men, will appear uncomfortable symptoms, the patient can check the prostate routine to confirm the diagnosis, and then targeted treatment, and through the diet and lifestyle regulation, can return to normal. When prostate hyperplasia is combined with infectious inflammation, or when there is retention of urine due to severe prostate hyperplasia, there will also be a feeling of swelling in the anal area. At this time, patients need to check the urinary system ultrasound to clarify the severity of the disease, and if necessary, surgical treatment can be carried out. If the prostate enlargement obstruction is cleared, urination will be smooth, and anal swelling and other uncomfortable symptoms will disappear. However, prostate hyperplasia will gradually and slowly increase after treatment, so the discomfort of anal swelling will recur.