The main causes of pain around the navel are: mesenteric lymphadenitis, enteritis, appendicitis, intestinal parasites and so on. 1. Mesenteric lymphadenitis: often secondary to upper respiratory tract infections, due to viral and bacterial infections of the mesenteric lymph nodes, resulting in inflammation and enlargement of the lymph nodes, the patient will usually experience abdominal pain, the initial stage of the disease may be manifested in the periumbilical pain, with the progression of the disease, the pain may be spread to the whole abdomen or confined to the right lower abdomen. 2. Enteritis: due to bacterial or viral invasion of the intestinal mucosa, resulting in localized inflammation, due to the stimulation of inflammation, it will make the intestinal spasm, peristalsis too fast, resulting in abdominal pain. The pain can be located in the umbilical region, can also be located in the lower abdomen or the whole abdomen, the patient may also be accompanied by nausea, vomiting, diarrhea and other symptoms. 3. Appendicitis: in the early stage of appendicitis, the inflammation does not invade the peritoneal tissue, usually manifested as pain around the umbilicus, with the progress of the disease, the inflammation invades the peritoneum, the pain is usually confined to the right lower abdomen. Therefore, if there is metastatic pain around the umbilicus to the right lower abdomen, we must be alert to the occurrence of appendicitis. 4. Intestinal parasites: Infection with intestinal parasites, such as intestinal roundworms, pinworms, hookworms, etc., due to the parasites in the intestinal tract, the mucosa of the intestinal tract produces irritation, which will lead to abdominal pain, the patient may be manifested as pain around the umbilicus or pain in the whole abdomen. The symptoms of periumbilical pain, must promptly seek medical attention, identify the cause, targeted treatment, do not miss the condition.