Babies always scratch their heads may be due to pediatric eczema, rickets, prickly heat and other diseases. 1. Pediatric eczema: the etiology of pediatric eczema is more complex, which may be caused by genetic, poor skin barrier function and other factors. Affected children will have pimples, itching and other symptoms, manifested by always scratching the head. 2. Rickets: Rickets is due to insufficient intake of vitamin D or lack of sufficient sun exposure. Children with rickets show irritability, excessive sweating, etc. Due to sweat irritation of the scalp, some children may appear to always scratch their heads. 3. Prickly heat: Prickly heat is mainly caused by hot and humid environment and prolonged bed rest. Children will have symptoms such as skin papules, pimples and tingling, and when prickly heat is on the face and head, they may always scratch their heads. Babies always scratch their heads, there may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.