Excessive sweating on a child’s back may be caused by an unsuitable temperature of the external environment, improper feeding, or lack of calcium. If the outside environment has a high temperature and high humidity, it may cause the child to sweat excessively, especially on the back. If the child is not eating properly, such as eating spicy and stimulating foods, he or she may also sweat excessively on the back. In addition, a child’s rapid growth and development may cause a calcium deficiency if calcium or vitamin D supplements are insufficient, which may also cause excessive back sweating. Children’s back sweating may also have other reasons, after excluding physiological factors, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.