Frequent picking of the navel can cause stomach pain, in fact, it is mainly because the periumbilical area is a weak place for the abdominal wall muscles, and it is closer to the organs in the abdominal cavity, and it is the connection point for several nerve centers, so the skin on the surface of the navel is particularly sensitive, and when the navel is picked hard it will produce an adverse reaction and stomach pain. Most people do not cause persistent pain, as long as you stop picking the navel, the pain will gradually reduce or not occur. But often picking the navel, but also easy to cause infection around the navel, the common clinical periumbilical infection, will appear around the umbilicus red, swollen, painful, and sometimes cause vomiting and other symptoms. So try to eliminate the bad habit of picking your belly button, you should use cotton swabs or soft gauze to clean it, and keep it dry locally, and when it appears red and swollen, you must disinfect it with local iodophor and apply erythromycin ointment to prevent infection.