4-year-old child sweating in bed, there are several reasons: 1, the child’s metabolism, coupled with daytime activity, or dinner ate high-calorie food, are caused by sleep sweating, this is no need to treat the physiological sweating. 2, pathological sweating, first of all, if the child sleeps and sweats and sleep is not solid, love to wake up, and there is an X-shaped leg or O-shaped legs, rib beads, etc., it may be a lack of calcium or a lack of Vitamin D deficiency. Secondly, if the child sweats in his sleep, accompanied by low fever in the afternoon, cough, fatigue, consider that the child suffers from tuberculosis.3. If the child sweats a lot, accompanied by hyperphagia, emaciation, protruding eyeballs, consider that the child suffers from hyperthyroidism. If your child has pathological sweating, you should take your child to the hospital for examination and treatment.