If a girl has pain inside the middle of her belly button, consider the possibility of abdominal pain caused by unclean diet and indigestion. If it is mild abdominal pain, it is recommended to take a light diet, pay attention to rest, avoid intake of stimulating food, drink more water, pay attention to keep warm, and warm the abdomen locally with a warm water bag. If the abdominal pain is persistent, it is recommended to go to the hospital for further consultation. It is also necessary to exclude organic diseases of the gastrointestinal tract, such as intestinal obstruction, intestinal torsion, acute appendicitis, acute pancreatitis and other gastrointestinal diseases.