Are there days when you wake up in the morning and you feel like you can’t turn your head? I do, and whenever that happens I always think, I probably slept funny. The truth of the matter is, it is more than likely that the neck was strained the day before. Probably from cradling the phone between your shoulder and neck or twisting awkwardly.
When this happens, it is best to take a nice hot shower. This will relax the muscles. If the pain is persistent or severe and worse if it radiates down the arms, it is best to see the doctor.