The body adapts to the continued presence of stress.
The body isolates the cause of the stressor.
The body reacts with a fight-or-flight response.
The body can no longer keep up with the demands placed on it.
"Stress" consists of three stages:
If the person is already on the third stage, it means that he has been exposed to the stressor for a long period of time. The body has already exhausted all its resources and can no longer keep up with the demands placed on it. This means that the person will become more susceptible to diseases due to poor immune system. He's also prone to have diabetes, heart problems, mental illness and so on.