My husband woke up one morning a few months ago and yelled in pain when he tried to get up. I thought a pulled muscle so we put a heat pack on it. He suffered for a week taking tylenol b4 he finally went to the e.r. E.R. didn't tell much so (with no insurance either!) we went to a chiropractor. Turns out extra vertebrae growth since birth (head had always tilted to one side slightly but we thought nothing of it) finally pushed on a nerve. Chiropractor got onto me cuz the heat made it worse! Electrotherapy a couple times a week and a neck brace at night helped him. Other than that he was told to get used to it until such time as it becomes chronic debilitating pain, then surgery would be necessary. No heat and Aleve was suggested although it doesn't immediately relieve pain.