WHAT YOU NEED TO KNOW: An umbilical hernia is a bulge through the abdominal muscles in the area of the navel (belly button). The hernia may contain tissue from the abdomen, part of an organ (such as the intestine), or fluid. Umbilical hernias usually happen because of a hole or a weak area in the muscles of the abdominal wall. This can happen at any age. Umbilical hernias happen more often in women than in men. You may be more likely to have a hernia if other family members have them.
In this article. The cause of the inflammatory bowel diseases (IBD), ulcerative colitis, and Crohn's disease, is not known. Studies suggest they are caused by a combination of things, including genes, environmental factors, and problems with the immune system.
Digestive Health. Subscribe to our Digestive Health e-newsletter to stay up to date on digestive health topics. The exact cause of inflammatory bowel disease remains unknown. Previously, diet and stress were suspected, but now doctors know that these factors may aggravate but don't cause IBD.One possible cause is an immune system malfunction.When your immune system tries to fight off an invading virus or bacterium, an abnormal immune response causes the immune system to attack the cells in the digestive tract, too.he exact cause of inflammatory bowel disease remains unknown. Previously, diet and stress were suspected, but now doctors know that these factors may aggravate but don't cause IBD.