Why do i have lower abdominal and lower back pain. i went to a doctor and she couldn't answer me. i don't have any infections.

Needs further test: Numerous conditions can cause lower back and lower abdominal pain. Severe pain in the lower abdomen and back should not be ignored.The most common lower abdominal pain causes are: A urinary disorder, such as bladder or kidney problems. A bowel problem.Constipation/IBD/IBS An problem with the reproductive system, PID. If your problems don't resolve in a day or two, make an appointment with your GP