Sustained work overload at home or work is a common cause, but other events, such as financial difficulties, problems with the family, serious illness or the breakdown of a family- anything that changes your daily routine drastically- could induce stress.
Most experts say that a small amount of stress is necessary, it motivates and stimulates our lives, and we need to be able to address daily situations to make us stronger to deal with larger changes. Sometimes however stress becomes too great or erodes the spirit over a period and this can even bring illness and in extreme can lead to an emotional breakdown.
Some personality types are more susceptible to stress than others and different types of people react to crises in different ways. No matter what type of person you are, the physical reactions are the same, not just in the mind but in the blood chemistry, and although they are activated by the sympathetic nervous system, your mind will determine the strength of your physical reaction.