21 yr old male. abdominal pain mid and lower left side through too back. pain waking me up from sleep. no bowel movements nausea and loss of appetite.

Medical check up: If your belly pain persists or it is getting worse, it needs to be checked by a physician who will do a physical exam. if there is any serious issue that he discovers, then a CT scan of the abdomen or an ultrasound(Sonogram) would be required to look inside(Image) your abdomen to make sure there is no serious disease inside the belly.