The most common causes of pillow fall are bad posture, inappropriate pillow, cold stimulation, etc. If accompanied by obvious discomfort symptoms, it is recommended to seek medical treatment in a timely manner. 1. Bad posture: Keeping a posture for a long time while sleeping, excessive flexion or extension will easily cause neck muscle injury and pillow fall. 2. Inappropriate pillows: If the pillow is too high or too low, the neck muscles are not uniformly stressed, which can easily cause some muscles to be overstressed, resulting in neck discomfort. 3. Cold stimulation: if the cold stimulation during sleep, it is easy to cause local muscle spasm, and then appear stiff neck, pain and other manifestations, pillow fall. The causes of pillow fall are more reasons, if there is no relief after rest, it is recommended to go to the hospital in time to find out the cause of the disease, the doctor choose the appropriate treatment, usually pay attention to the warmth of the neck, choose the right pillow.