Female belly button parallel left side pain may be pelvic inflammatory disease, intestinal spasm, colitis, ureteral stones and colon tumor and other causes. 1. Pelvic inflammatory disease: Pelvic inflammatory disease refers to the inflammation of the female reproductive organs, connective tissues around the uterus and pelvic peritoneum, and female patients will have the symptom of pain in the left side of the navel parallel. 2. Intestinal spasm: when the small intestine peristalsis is irregular, or when the abdomen is cold, it will lead to the symptoms of pain in the left side of the navel parallel. 3. Left hemicolonitis: colitis refers to inflammatory lesions of the colon caused by various reasons, female patients will have symptoms of pain in the left side of the navel parallel, usually accompanied by diarrhea, abdominal pain and constipation. 4. left urinary stones: ureteral stones are caused by kidney stones falling in the ureter. The patient will have the symptom of pain on the left side parallel to the navel. 5. Left colon tumor: colon tumor is a malignant tumor that occurs in the colon, patients and will appear will appear the symptoms of pain in the left side of the umbilicus, some patients will also appear blood in the stool and indigestion and other symptoms. When women have pain in the left side of the navel, they should go to the hospital in time, after clarifying the cause of the disease and actively cooperate with the doctor’s treatment.