Babies always scratch their heads may be scalp folliculitis, pediatric eczema, rickets and other diseases. 1. Scalp folliculitis: scalp folliculitis may be caused by bacterial infection, local trauma, low immunity and other factors. Affected children will have red papules, itching, slight pain and other symptoms, manifested by the baby always scratching his head. 2. Pediatric eczema: the cause of pediatric eczema is more complex, may be their own skin barrier function is impaired, food allergies and other factors. Affected children mainly manifested as erythema, papules, obvious itching, etc., can appear baby always scratching the head. 3. Rickets: Rickets is due to vitamin D deficiency in the body. Affected children will appear excessive sweating, irritability and other symptoms, due to excessive sweating to stimulate the scalp, some of the affected children manifested as always scratching the head. Babies always scratch their heads, 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.