Basically, this says what most people know to be true - stress can have serious effects on a person's mental health. The How To Survive Unbearable Stress website by Dr. Steven L. Burns, M.D. says that the physical and emotional effects of overstress on the brain can include fatigue, aches and pains, crying, depression, anxiety attacks, and lack of sleep. When these actions occur, sometimes they can be caused by chemical malfunctions in the brain, the site says. Serotonin is what helps the body sleep and regulates things in the body such as temperature and the hormones in the body that fight stress. If a person's serotonin level decreases, so will his or her ability to fight stress, the site says.
Noradrenaline gives the body energy.
If a person's noradrenaline levels are low he or she will feel exhausted, lethargic, and without energy. All the person wants to do is sit, the site says. High stress levels affect a person's energy level, thereby affecting his or her noradrenaline levels. Dopamine sets a person's pleasure and pain levels. It is concentrated in the same area of the brain as endorphins, the chemicals that regulate how much pain a person can tolerate, the site says.