There are several reasons for neck pain when sleeping: First, the pillow is too high when sleeping, some people are used to pillow high pillow caused by the neck muscles, soft tissues appear long time stiff, tense state. In the morning, you will get up due to strain and excessive muscle function contraction for a long time resulting in pain. Second, see the sleep temperature is relatively low, the neck is cold, such as sleeping air conditioning direct blowing, fan direct blowing, and then there is no good indoor warming when the season, easily lead to cold affect the neck and shoulder blood circulation, resulting in neck pain. Third, see in the cervical spine disorders, such as cervical spondylosis cervical degeneration, will appear the corresponding morning up to sleep up neck pain symptoms, it is recommended that patients pay attention to the above aspects, if there is no relief timely medical treatment.