Headaches occur in over 90% of school-age children and are generally not serious. It is a common symptom and in most cases, the causes are simple. It may be due to a lack of sleep, hunger or even anxiety before an exam. Children get the same types of headaches adults do, such as tension headaches and migraines. However, young children generally do not complain of headaches so any such complaints, especially if persistent or recurrent, should be taken seriously. Certain features of a headache will point to important conditions that may need urgent treatment.