[Fear and anxiety].

By means of a phenomenologic-existential approach, the author presents a summarized study on anguish, taking into account the descriptions Schelling, Kierkegaard and Heidegger wrote about. He considers that, inspired by different problematics and thanks to their respective investigations, those philosophers represent a comprehensive 'model' for the clinico-psychological and psychiatric understanding of every kind of development where anguish is the 'axial' symptom.