CausesBy Mayo Clinic staff
During pregnancy, the umbilical cord passes through a small opening in the baby's abdominal muscles. The opening normally closes just after birth. If the muscles don't join together completely in the midline of the abdomen, this weakness in the abdominal wall may cause an umbilical hernia at birth or later in life.
In adults, too much abdominal pressure can cause an umbilical hernia. Possible causes in adults include:
- Multiple pregnancies
- Fluid in the abdominal cavity (ascites)
- Previous abdominal surgery
- Hernias of the abdominal wall. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/gastrointestinal_disorders/acute_abdomen_and_surgical_gastroenterology/hernias_of_the_abdominal_wall.html#v890814. Accessed March 23, 2012.
- Brandt ML. Pediatric hernias. Surgical Clinics of North America. 2008;88:27.
- Brooks DC. Overview of abdominal wall hernias. http://www.uptodate.com/index. Accessed March 23, 2012.
- Palazzi DL, et al. Care of the umbilicus and management of umbilical disorders. http://www.uptodate.com/index. Accessed March 23, 2012.
- Salameh JR. Primary and unusual abdominal wall hernias. Surgical Clinics of North America. 2008;88:45.
- Hoecker JL (expert opinion). Mayo Clinic, Rochester, Minn. March 24, 2012.