Babies sweat easily may be a normal phenomenon, or it may be caused by fever, lack of vitamins and other reasons. 1. Normal phenomenon: all aspects of the baby’s body are in the stage of development, especially the central nervous system is not yet fully developed. The autonomic nerves are more disorganized, so the baby’s function of regulating sweat is weaker, and then the baby sweats easily. 2. Fever: Fever will cause the body temperature to rise, in order to cool down, the body will sweat to regulate body temperature. So if your baby has a fever, he or she may sweat easily. 3. Vitamin deficiency: When the baby lacks vitamins, especially vitamin D, he may suffer from rickets. This disease may cause babies to sweat easily, accompanied by symptoms such as irritability and easy to cry, easy to wake up at night. Parents are advised to take their babies to the hospital for diagnosis, clarification of the cause and prompt treatment when their babies are prone to sweating.