The common causes of headache in children are acute injury, migraine, infectious diseases, brain lesions and other factors. 1. Acute injury: for example, the head suffered an external blow, resulting in localized damage and intracranial hemorrhage, will cause headache symptoms, may also be accompanied by subcutaneous bruising, swelling and other symptoms. 2. Migraine: it may be related to bad mood, over fatigue and other factors, which will cause children to have frequent headaches, which may be accompanied by symptoms such as photophobia, phonophobia, nausea, vomiting and so on. 3. Infectious diseases: such as meningitis, otitis media, pneumonia and sinusitis, etc., all of which may induce headaches, and may be accompanied by fever, fatigue, nasal congestion and other symptoms. 4. Brain lesions: such as brain tumors, cerebral vascular malformation, etc., will make the child headache symptoms, and headache is more intense, may also be accompanied by dizziness, nausea and vomiting and other symptoms. Children’s headache, 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.