If a child has a sudden headache, it is likely to be caused by a cold or fever. It is recommended to take the body temperature first to exclude the symptoms of fever, and to observe whether the child has a runny nose, nasal congestion, sneezing and other symptoms. If there are these cold symptoms, it is likely that the headache is caused by the cold. It is recommended to take antipyretic and analgesic drugs, such as pediatric aminophenol xanthamine granules, ibuprofen granules, and compound zinc boo granules, which are very effective in relieving the headache. It can also be combined with anti-inflammatory drugs, such as erythromycin granules, azithromycin granules, etc., which are very effective in improving the symptoms of cold and flu, and these symptoms can be relieved after taking the drugs for 2 consecutive days. If the headache persists and the headache is accompanied by jet vomiting, it is likely to be caused by intracranial lesions, so it is necessary to go to the hospital in a timely manner, and if necessary, a brain CT examination is needed to assist in the diagnosis.