A pinched nerve in the neck can cause a condition known as a cervicogenic headache. Turning your head or holding it in one position for a long time can trigger this type of headache. Some of the ways that you can relieve your symptoms in this circumstance are applying heat and cold to the neck, resting as much as possible, and lightly stretching. If home care does not prove effective, it’s recommended to see a specialist to diagnose the root cause of your discomfort and administer effective treatment. Doctors can provide instructions on physical therapy techniques to use in order to successfully relieve tension and discomfort behind your neck and head.