The baby is always scratching his head, considering the existence of head eczema, calcium deficiency, head lice and other factors caused by the need to promptly identify the cause of treatment. 1. head eczema: if the baby belongs to the allergic body, or contact, intake of certain allergic substances, can lead to the baby’s head and neck, face and other skin eczema, which causes local skin itching and other discomfort, so the baby will use their hands to scratch the hair to stop itching. 2. Calcium deficiency: if the baby body lacks vitamin D or calcium, can cause rickets and other phenomena, resulting in increased nerve excitability of the brain, so the head is more prone to sweating. And too much sweat can cause itchy scalp, so the baby will also use their hands to scratch their head. 3. head lice: in addition to the usual parents of the baby skin care is not in place, can lead to the emergence of head lice, head lice parasites in the baby’s scalp, can also lead to localized itching and other phenomena, so the baby will also go to scratching to stop the itch. Because of the causes of baby scratching more reasons, it is best to closely observe the baby’s accompanying symptoms, timely hospitalization to identify the cause of the disease.