A person experiences stress when he or she experiences things that are perceived to go beyond their coping abilities. It is the internal reaction to the perceived threat of either internal or external stressors. Internal stressors can be things like sickness, disease or hunger. External stressors include things such as divorce and other marital problems, work related problems, death of a loved one or financial troubles. It may also be the result of extreme but short lived events such as natural disasters or exposure to crime, war or terrorism.