Many parents have questions about whether they should dress their infants in many clothes. Whether an infant is afraid of the cold is determined. It is not true that babies are not afraid of cold and heat in the older generation. 1, in reality, babies are afraid of both cold and heat, babies are just born, the thermoregulatory system is not very well, so the environment is too cold or too hot will cause them some harm. The old generation said that the anecdotal evidence of fear of cold and heat is not based on science. 2, if the newborn baby is placed in too cold or too hot environment, the baby will not adapt to the body too cold or too hot, thus causing colds or other diseases. Therefore, pay attention to the baby’s living environment, do not give the baby wear inappropriate clothing. 3, the baby’s fear of cold and heat is based on science. Afraid of cold because the body surface area is relatively large, and the baby’s subcutaneous fat is not fully developed. Fear of heat is because the baby’s metabolism is more vigorous, many even more than adults. So care should be taken not to expose the baby to too cold or too hot environment. The hot and cold environment can sometimes have a greater impact on a baby’s health, so parents’ attention should be drawn to it.