Hidden pain behind the navel may be caused by appendicitis, intestinal diseases, irritable bowel syndrome and other diseases. 1. Appendicitis: in the early stage of acute appendicitis, hidden pain behind the navel can occur. 2. Intestinal diseases: such as acute enteritis, due to eating unclean food, can cause intestinal infections and inflammatory reactions, can lead to hidden pain behind the navel. 3. Irritable bowel syndrome: abdominal pain can occur around the umbilicus, easy to appear after eating, abdominal pain is mostly relieved after defecation. It is recommended that people with pain behind the navel go to the hospital in a timely manner to clarify the cause of the disease and standardize the treatment under the guidance of the doctor, so as not to delay the condition of the body to bring about adverse effects.