The main cause of persistent vague pain below the belly button is acute and chronic gastroenteritis most commonly. In particular, inflammation of the duodenum or small intestine leads to spasmodic episodes with more frequent, intermittent episodes of pain. Most of this situation may be due to long-term overeating, eating spicy and irritating food, as well as drinking alcohol and irregular diet, which can be relieved by appropriate dietary structure adjustment, local heat compresses and microwave physiotherapy. For children with vague pain, the possibility of internal hernia due to intussusception or intestinal torsion is not excluded. The pain below the navel should not be ignored completely, and it is important to go to the hospital in time to find the exact cause.