Pain on the left side of the navel may be caused by acute enteritis, intestinal obstruction, left urinary stones or gynecological diseases. 1. Acute enteritis: patients eat unclean food, resulting in intestinal infections, there will be pain on the left side of the navel, most of the pain around the umbilicus, accompanied by symptoms of diarrhea. 2. Intestinal obstruction: common in the left side of the low intestinal obstruction, the left side of the abdominal pain, abdominal distension, anal stop defecation. 3. Left-sided urinary stones: the patient’s left-sided abdominal pain is more intense, the pain will radiate to the perineum and accompanied by hematuria. 4. Gynecological diseases: if a woman is in this situation, it may be caused by salpingitis, ovarian cyst torsion, ectopic pregnancy and other gynecological diseases. The left side of the navel pain may also be caused by intestinal cramps, etc. Patients should go to the hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor reasonable treatment.