Headaches in children after a good fever may be a relatively common symptom of fever, related to high fever; it may also be due to a combination of neurological infections, sinusitis and other factors. 1. caused by fever: if the fever persists and does not go away, it may cause dilation of the intracranial arteries, thus causing headache, which is a relatively common symptom when the fever is high. 2. Neurological infections: fever is usually associated with infection with bacteria, viruses, fungi, if you do not clean up the pathogenic bacteria in time, after repeated stimulation of nerve tissue, easy to cause neurological infections, which can cause meningitis, encephalitis and other diseases, when the headache is severe. 3. Sinusitis: Sinusitis is a common symptom due to localized inflammation leading to headaches, usually accompanied by runny nose, nasal congestion, loss of smell and other symptoms. Children’s headache after a good fever, 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.