Itching in the vaginal area with back pain and left side just below the stomach has pain?

Doctor can examine: The left abdomen has muscles of the abdominal wall (and nerves coming out of the spinal cord, going to the muscles), the stomach, spleen, parts of the large intestine (colon) and small intestine, the ureter from the left kidney to the bladder, etc... Pain can be from a variety of problems (such as constipation, colitis, etc.), so anything other than mild brief pain should be checked by a doctor.