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.
Ileus may also be caused by an infection inside the abdomen, such as appendicitis or diverticulitis. Disorders outside the intestine, such as kidney failure, an underactive thyroid gland, or abnormal levels of blood electrolytes (low potassium levels or high calcium levels, for example), may cause ileus.
What Causes Joint Crepitus? Common causes of creptius include: Air bubbles popping inside the joint. This popping does not cause pain. Tendons or ligaments snapping over the joint's bony structures. This snapping sometimes causes pain. Arthritisâtypically either osteoarthritis or rheumatoid arthritisâthat causes a jointâs articular cartilage to degenerate. While arthritis often leads to pain, not everyone with joint degeneration will experience it.