Pain in the middle of the belly button is often caused by the following reasons: 1, bladder disease, such as congestive cystitis, bladder polyps or malignant tumors, sometimes also due to overfilling of the bladder, can go to the hospital urology department for examination, need to check the blood routine, urine routine, bladder ultrasound or lower abdominal CT, etc., according to the results of treatment. 2, may be caused by acute enteritis. The company’s main goal is to provide a comprehensive range of products and services to the public.