Headaches are head pains, regardless of their cause. Commonly called "headaches", they are located on the cranial vault, excluding the neck and face. Very frequent, they are one of the first reasons for medical consultation. Migraine is one of the main causes. Their diagnosis is not always easy. Sometimes blood, ophthalmological or dental tests, X-rays of the sinuses or the entire skull are used, and exceptionally an electroencephalogram or a brain scan is done. The evolution of headaches is extremely variable, from a few hours to a few days, the attacks can be repeated during several years.