If the indoor temperature is suitable, maintained at 20 to 25 ℃, it is not recommended to wear a hat when the newborn sleeps; if the indoor temperature is too low in winter, you can wear a hat when you sleep. Indoor temperature at 20 ~ 25 ℃ is more appropriate, due to the newborn’s vigorous metabolism, head sweating more, and then wear a hat, head heat can not be dispersed in a timely manner, to stay on the surface of the scalp, easy to cause sweating herpes, and even bacterial growth, pustules. Moreover, the newborn sleep wearing a hat, easy to make the baby lack of security, and uncomfortable, followed by sleep disturbance, frequent night awakening, in the long run is likely to affect the growth and development. However, if the indoor temperature is too low in winter, due to the newborn fontanel is not closed, coupled with poor adaptability, easy to catch a cold, sleep can wear a hat. If you find that your newborn baby has frequent night cries and other discomforts, we recommend that you consult a doctor in a timely manner.