Could be that you are developing trigeminal neuralgia. This condition occurs when a blood vessel in the back of the neck touches a nerve. It is an extremely painful and progressive condition. Powerful drugs such as Tegratol are used to control the pain. In severe conditions, surgery is an option. I hope that you don't have trigeminal neuralgia. If the pain persists, you should visit a neurologist because it is too severe for anyone to tolerate without medication. Good luck.