Small children say that headaches may be caused by lack of sleep, respiratory infections, sinusitis and other reasons. 1. Lack of sleep: if the child often stay up late, or learning pressure, long time staring at electronic products, etc., may lead to sleep deprivation, and thus the symptoms of headache. 2. Respiratory infections: If the daily temperature fluctuates too much, the child does not do a good job of keeping warm, etc., the child is susceptible to infection with bacteria or viruses, and headache symptoms, more often accompanied by coughing, runny nose, sneezing and other symptoms. 3. Sinusitis: mostly due to increased secretions or sinus mouth blockage, causing local mucosal edema, resulting in children often also appear headache symptoms, accompanied by nasal congestion, runny nose and other symptoms. Children say headache may also be caused by other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.