A newborn’s crying when changing a diaper may be caused by incorrect diaper changing techniques or a parent’s hand temperature that is too cold, or a baby with a skin condition. 1. change diaper technique is not right or parents hand temperature is too cold: parents in the child diaper change, if the technique is too rough, or hold the newborn posture is not right, or hand temperature is too cold, etc., will make the baby uncomfortable phenomenon, thus causing the baby to cry. 2. baby has skin disease: if the baby’s buttocks or perineum have eczema, prickly heat, diaper dermatitis, etc., in the change of diaper, will produce friction, the baby will appear skin pain or itching, there will be crying. There may be other reasons why a newborn baby cries when changing diapers, so it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.