In general, the causes of pain on the left side of the belly button in children include the following. The first is due to children suffering from gastrointestinal dysfunction caused by symptoms, after the occurrence of gastrointestinal dysfunction, will cause pain on the left side of the belly button. And to children’s abdominal examination, no abdominal masses are found, you can properly apply probiotics, such as small Pefikon to regulate. The second is caused by children suffering from dry stools, intestinal memory with feces will cause pain on the left side of the navel, you can feel the fecal mass through the abdominal examination, you can apply the children’s open plug laxative treatment, after the stool is smooth the left side of the navel pain will naturally disappear.