Three-month-old baby sleep always shaking his head for more reasons, such as vitamin D deficiency, eczema, indoor temperature is too high, need to be based on different causes of reasonable treatment, such as supplemental vitamin D, anti-allergy and anti-itch medication, to improve the indoor environment and so on. 1. Vitamin D deficiency: three-month-old babies who lack vitamin D in the body can lead to the emergence of rickets, in the early stage of rickets, can be manifested as night terrors, crying, sweating, shaking the head and other phenomena. Need to go to the hospital in time, can be given under the guidance of the doctor vitamin D supplementation, such as oral or injectable vitamin D, followed by more sunshine, to promote the generation of vitamin D in the body. 2. Eczema: If the three-month-old baby head eczema, can be too itchy at night when sleeping and the phenomenon of shaking head rubbing, can be applied locally glycerine lotion to alleviate the symptoms. 3. Indoor temperature is too high: if the baby sleeps in the room temperature is relatively high, resulting in head sweating more, will also cause the baby sleep restless repeatedly shaking head rubbing phenomenon. It is important to lower the room temperature in time, through the air conditioner or fan to keep the room temperature cool, and pay attention to indoor ventilation to keep the indoor air fresh. All of the above drugs should be used under the guidance of a doctor, avoid self-medication. As there are more causes for three-month-old babies to shake their heads while sleeping, it is best to go to the hospital first to clarify the cause of the disease and then take reasonable treatment.