Medical stress can be defined as change in body's normal internal [?] which leads to a number of hormonal and neurological responses so that normal balance is restored.Stress can result from both [?] factors(arising within the body)or [?] stimuli.These factors can be both positive(e.g. birth) or negative(e.g.heavy drinking).In normal parlance the word "stress" basically refers to psychological stress and stress management refers to life-style strategies aimed at controlling such psychological factors which alleviate stress producing stimuli.Though one or other form of stress is an everyday occurrence which can be considered as a part normal biological existence,stress in excess can lead to multitude of problems.Certain [?] conditions are also identified with stress such as "Post traumatic stress disorder"- a psychiatric condition resulting from sudden exposure to excessive stress producing external stimuli such as major accident.