Rectal and sigmoiditis can cause pain around the umbilicus. Rectal, sigmoid colonitis when the intestinal mucosa inflammatory changes, stimulate intestinal muscle spasm, spasmodic pain, mostly for the left lower abdominal pain, pain around the navel is mostly inflammation to expand the scope of aggravation of the manifestation of the disease, usually intermittent episodes. Rectal, sigmoid colitis can also lead to faster intestinal peristalsis, which can cause intestinal spasm, resulting in pain around the umbilicus. Rectal and sigmoid colitis is usually accompanied by changes in bowel habits and character. If the pain around the navel persists unrelieved, or accompanied by blood in the stool and other discomforts promptly seek medical attention, standardized treatment under the guidance of a doctor.