Hidden pain around the navel in the morning may be gastroenteritis, transverse colon lesions, tumor diseases. 1. Gastroenteritis: the main symptoms of gastroenteritis are abdominal pain, cramps, diarrhea, nausea, vomiting, etc., and there may be hidden pain in the morning, which is usually aggravated after eating irritating food. 2. Transverse colon lesion: If there is a tumor in the transverse colon, such as transverse colon cancer or transverse colon adenoma, the patient may have the symptom of pain around the navel in the morning. In addition, if inflammation occurs in the transverse colon, it may also cause hidden pain around the belly button. 3. Neoplastic diseases: some other parts of the tumor may also cause pain around the navel, such as small intestinal mesenchymal tumor, lymphoma, adenocarcinoma of the small intestine and so on. In addition to the above factors, it is not excluded that the pain is caused by other reasons, and it is recommended that patients go to the hospital for treatment in time.