Psychology manifestations of stressful situations

In various spheres of human activity, the concept of stress exists everywhere: physiology, medicine, sociology, psychology. Depending on factors there are several types of so-called stressors (the phenomenon that creates this condition, ie cause): at the level of physiology - the nervous factor, at the medical level - physical-mental-level sociology and psychology - individual or mass psychological impact. Anyway, any kind of stress always entail a certain impact on the body, which is General and usually nonspecific manifestations.