What cause pain in back of head toward right side?
Pulled muscle or pinched nerve. Did you get up feeling that way? If you did, it may have been the way you lay your head on the pillow, maybe it was to high. Try this acupressure procedure to relax the muscles in your neck. With your thumb and index finger on both hands, grab and pinch the eyebrows, with a little skin behind them, starting on both eyebrows closest to the nose, hold and count to seven, a slow seven, and then move to the center, same procedure, then move to the end farthest away from your nose. See if that don’t at least relax the muscles. You can also take a 600 mg Motrin. If that pain continues and nothing you do helps, better have an x-ray to find out what’s going on. Good luck to you sir.