Pain around the left side of the navel is usually caused by the following diseases: 1. urinary stones, the main clinical manifestation is abdominal cramps, the pain often spreads to the perineum and inner thighs, some patients may have pain in the left lumbar region and percussion pain in the left kidney area. Patients are recommended to improve urine routine and urinary ultrasound examination to assist in the diagnosis. 2. intestinal obstruction, the main clinical manifestation is periumbilical colic, often accompanied by abdominal distension, nausea, vomiting, and anal cessation of exhaustion and defecation, patients are recommended to improve abdominal plain film and other examinations. 3. acute gastroenteritis, patients usually appear abdominal colic, accompanied by abdominal distension, fever, diarrhea, nausea and vomiting, patients need to improve stool routine, blood routine, abdominal plain film and other examinations, Patients need to improve stool routine, blood routine, abdominal plain film and other examinations.