| Abstract: | The authors describe a proposal of classification of chronic and recurrent headaches based on criteria different from those used as yet. The initial criterion of headache classification was its extent and location: 1) diffuse, 2) partial, 3) posterior, b) anterior, 3)localized. Another element is: 1) unequivical or 2) non-unequivical clinical pattern. Definite clinical entities, probable aetiological factors, or possible pathological mechanisms are referred to definite extent and localization, and unequivocal or non-unequivocal clinical patterns. |
