Below the navel is part of the small intestine, the omentum, and possibly the transverse colon as well as the mesentery. Therefore, if there is pain at the navel, the above-mentioned diseases should be considered, and pain at the navel may also occur in the early stages of appendicitis. If the pain is in the small intestine, it is usually caused by intestinal spasm, a sudden increase in the peristalsis of the small intestine that causes pain in the abdomen. The pain can usually be relieved after resting or applying warm towels or massaging the abdomen with your hands. If it is mesenteric lymphadenitis, it can also be manifested as pain around the navel, which is usually seen in teenagers or children, mostly after a history of colds. Appendicitis can also occur in the early stages of belly button pain, and slowly the location of the pain will shift to the right lower abdomen, you can perform an ultrasound examination of the appendix to make a diagnosis, after the diagnosis usually requires surgery to remove the appendix.