Newborns always sleep with their hands up, may be a normal neonatal physiological phenomenon, may also be sleep environment is not adapted, too cold, too hot, too noisy, so that the newborn lack of security, or because of the lack of some trace elements caused by sleep instability, always with their hands up, long-term sleep poor can affect the growth and development of newborns, should be corrected: 1, physiological phenomenon: the neonatal nervous system Development is immature, the brain function is relatively young, the control of the action is not very fine, the mental stress during the day was not completely eliminated, and only at night when sleeping and relaxed, so it is easy to sleep in a startled hands up, is the normal development of newborn physiological phenomenon, generally in the brain gradually developed and stable, this phenomenon can disappear naturally; 2, sleep environment: newborns to the external environment The ability to adapt to the external environment is relatively weak, too cold and too hot, the environment is noisy, lack of security or frightened during sleep, etc., are likely to induce a startle response, manifested as a startle hands up, at this time parents did not pay attention in time, making the symptoms occur relatively frequently. Therefore, usually take care of newborns to sleep, should pay attention to proper warmth, not too cold and too hot, usually more gentle way to contact the newborn, so that the newborn to gain a sense of security, to maintain a quiet sleep environment, often able to improve the symptoms of newborns a startle; 3, lack of trace elements: newborns lack of vitamin A, vitamin D, will affect the absorption of calcium, calcium deficiency will cause increased neuroexcitability, the It is easy to cause unconscious movements, sleep always a startling hands up, you can properly supplement calcium and vitamin A, vitamin D, usually more out in the sun, can effectively improve the symptoms of calcium deficiency, to relieve the newborn sleep a startling.