Everyone sleeps in a different posture, sleep habits are different, sleep with your hands above your head, if you can change the position for a short time there is no impact on the body, if you keep the same posture for a long time is not beneficial to health. Because a long time hands overhead, in the night sleep process because of the relative slowdown of metabolism, blood circulation will slow down, may lead to poor blood flow in both hands hands numbness, arm numbness, soreness and other uncomfortable symptoms, a long time may also lead to poor circulation. Hands above the head, not conducive to the body in the most relaxed state, may lead to increased dreaming, affecting the quality of sleep, it is best to change position often when sleeping, should choose their own feeling the most relaxed, the most comfortable position.