My neck hurts really bad in the back area and hurts when I turn my head. The area where my neck meets the skull hurts so bad wheb I yawn. Help!

Muscle spasm . Probably slept wrong if is acute, and rest and heat should relax the muscle spasm. You did not mention any neck injuries. If is chronic (over 2-3 months) then you need to see osteopath or physiatrist to be properly diagnosed. The treatment will depend on which tissue, bone, joint, ligament, tendon, or muscle is involved, and this requires an hands-on evaluation.