It is now considered a well-established fact that psychological stress can be a trigger or important factor in a variety of physical symptoms and diseases processes. There is abundant evidence of this link in the medical literaure as well as in current medical practices. For example:
Medical research suggests that up to 90 percent of all illness and disease is stress-related, according to the Centers for Disease Control and Prevention.
Evidence shows chronic stress can lower immunity and make people more susceptible to infections. Conversely, stress-reduction strategies, such as meditation, relaxation, and exercise, have been shown to help reverse this effect (by increasing the number of infection-fighting T cells and feel-good chemicals called endorphins in the body, for example) and prevent disease.
Stress has been shown to contribute to the development of heart disease and high blood pressure. As a result of those findings, most heart programs incorporate stress management and exercise, and stress reduction now plays a very prominent role in both the treatment and prevention of cardiovascular diseases.
Skin doctors have found that many skin conditions, such as hives and eczema, are related to stress.
Stress is thought to be a common cause of everyday aches, pains, and health problems, such as headaches, backaches, stomachaches, diarrhea, sleep loss, and loss of sex drive. Stress also appears to stimulate appetite and contribute to weight gain.