[Nosological classification of headaches]

The problem of headache classification is still open. As a mention of all the attempts to classification is not possible, the Author proposes the scheme of work adopted at Turin Headache Unit (referring himself to the best known classifications). The most important idiopathic headaches are described and it is also suggested that they should be kept separated, one from the other, at least up to now. This criterium makes also easier their differential diagnosis from other head pains. Anyway, is has to be emphasized the actual tendency to group together an ever larger amount of headache types.