The sudden appearance of the neck with the back of a painful situation, there may be the following reasons: First, the pillow, and improper sleep position, there is no feeling in the sleep, but after waking up will feel pain in the neck, and a little activity pain will increase, at this time to consider is caused by the pillow. Second, muscle spasm, shoulders and neck for a long time in the same posture, such as long hours of ambulation or shoulder and neck straight for a long time, will lead to muscle spasm, want to change the posture when you feel pain in the neck and back. Third, the pain caused by back fasciitis, may be due to trauma, or cold caused by the back of the back of the fascias at the sterile inflammation resulting in pain. Fourth, pain caused by nerve lesions in the neck. There are many nerves in the shoulder and neck, which may cause pain in the shoulder and neck due to nerve lesions.