What causes stress?
Situations which are recognised to be very stressful are associated with change, and with lack of control over what is happening. Some of the causes of stress are happy events, but because they bring big changes or make unusual demands on you, they can still be stressful.
Some of the most stressful events are:
moving house
getting married
having a baby
bereavement
serious illness in yourself or a friend or family member.