The baby sleeps all the time scratching his head to consider is too high temperature, lack of calcium, eczema and other factors triggered. 1. High temperature, if the baby sleeps in the process of the environment temperature is high or cover thicker may lead to head sweat, so there will be sleep has been scratching the head symptoms. 2. Calcium deficiency, if the baby calcium deficiency, may lead to the baby abnormal irritability, but also night sweats (sleep sweating abnormal, wake up sweating stops) reaction, sweating increased head scratching symptoms may occur. 3. eczema, if the baby has eczema may lead to the baby head itching, sleeping process itching aggravation may lead to have been scratching the head of the situation. Baby sleep has been scratching the head, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.