Hidden pain in the third finger below the umbilicus may be caused by urological diseases such as cystitis, appendicitis, gynecological diseases such as pelvic inflammatory disease, intestinal diseases such as intestinal obstruction and other diseases. 1. Causes of cystitis include sexual intercourse and unclean personal hygiene. This disease is mainly manifested in severe urinary frequency, urinary urgency, urinary pain, hematuria and so on. Pressure pain in the suprapubic bladder area is also seen on physical examination. 2. Appendicitis in abnormal areas may also manifest as vague pain under the umbilicus, pressure pain and other manifestations. 3. Pelvic diseases, such as pelvic inflammatory disease, ectopic pregnancy, adnexitis, etc., may lead to lower abdominal pain, sometimes manifested as vague pain. Physical examination often has pressure pain under the umbilicus and other parts. 4. Intestinal obstruction: mostly simple intestinal obstruction occurs in the lower abdominal pain. It is usually paroxysmal colic pain, or hidden pain, accompanied by nausea, vomiting and other symptoms. There are many causes of pain below the umbilicus, once similar symptoms, should go to the hospital, improve the examination, clear diagnosis and follow the doctor’s instructions for treatment.