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.
Story at-a-glance 1  +. Feline inflammatory bowel disease, like IBD in other susceptible animals, is thought to be caused by a variety of factors including diet, gut flora, abnormal immune response, and environment.y Dr. Becker Inflammatory bowel disease or IBD is actually a group of diseases involving uncontrolled intestinal inflammation. IBD in kitties (and other susceptible animals) is thought to be caused by a combination of factors including diet, gut bacteria, environment, and an abnormal immune system response.