In the last few years there has been an increasing interest on the study of the phenomenon of stress. The study of stress is justified, while it is connected with the event of symptoms /clues in organic and psychological level. What concerns the first part, usually mild or serious psychosomatic problems are expressed. What concerns the psychological level, stress influences the behavior (increased concern and irascibility), the sentimental reactions (increased stress, sentimental precessions), the cognitive functionalism (difficulty in self-concentration) and the social behavior as with drawl, restriction of social relations This article deals with issues as the definition of the term “stress”, the theoretical approaches of stress and a critical review of theories of stress.
Key- words: stress, theories, approaches, health.