If a 12-year-old child has a headache, the main causes are the following: 1. neurological headache, if the child often does not get enough sleep, usually overworked in studying, overuse of the brain or usually too emotional, etc., may trigger headache symptoms, this pain is generally neurological pain; so children should go to bed early and get up early, it is best not to stay up late; if the condition is serious, it is necessary to go to the hospital in a timely manner; 2. Upper respiratory tract infection, depending on whether the child has a fever or a cold recently, because the main symptom of a cold is a headache or weakness, etc.; the cold can be treated with cold medicine, and attention should be paid to keeping warm and avoiding getting cold; 3. sinusitis is also one of the main causes of headaches; 4. brain disorders, such as headaches caused by meningitis, encephalitis, brain tumors, etc., such children have more intense headaches It is recommended that patients go to the hospital in time for examination and further treatment after a clear diagnosis.