Children often have headaches may be related to sinusitis, lack of sleep, intracranial lesions and other factors. 1. Sinusitis: children often have headaches may be related to infections, such as sinusitis and other inflammatory stimuli, sinusitis can also be accompanied by runny nose, nasal congestion, loss of smell and so on. 2. Lack of sleep: children who usually do not pay attention to rest, sleep at night does not reach the time, may also appear in the above situation. 3. Intracranial lesions: children who often have headaches, accompanied by vomiting, fever and other conditions, need to be alert to intracranial infection and intracranial space-occupying lesions. Children often have headaches may also have other reasons, it is recommended to go to the hospital in time for relevant examinations, clear causes of the disease and actively treat the symptoms.