Because the baby’s blood circulation system is not well developed, so if the weather is cold, sleep with hands and feet exposed, it is easy to have a cold, fever, baby’s resistance is relatively poor when more likely to get sick, so baby sleep to try to avoid the wind and cold. If the baby’s sleep quality is poor, it has a very negative impact on physical development. Daily life can eat more vegetables, fruits, etc., to properly replenish the body’s vitamins, etc., to help strengthen the body’s resistance and immunity, but also massage, physical therapy, etc. can be combined with treatment. Because most babies will feel hot under the blanket in winter, sweat more, and the blanket is too heavy, they will have the performance of resisting the blanket, so they will put their hands outside the blanket. If the indoor temperature is high in winter, there is no need to cover your baby too thickly to avoid cold hands.