Neck drop pillow is mainly due to the patient in the process of sleep, improper posture, pillow too high and the neck is cold and other factors. 1. Improper sleep posture: In the process of sleeping, if you keep an improper posture for a long time, especially when favoring one side, it can lead to the muscles on the affected side being in a state of tension for a long time, which will lead to muscle strain and the formation of pillow fall. 2. Pillow is too high: for patients who are used to using higher pillows during sleep, it can also lead to prolonged forward bending of the head, the neck muscles are in a state of tension for a long time, resulting in edema, pain and inflammatory changes. 3. Cold: cold neck during sleep can lead to neck vasoconstriction, muscle spasm, which can cause muscle pain and edema, resulting in pillow fall. When there is a pillow, it is recommended to go to the hospital, the professional physician to give appropriate treatment measures.