Physical Stress

Describe the relationship between stress and physical illness?
This is one of my study guide questions and I can't seem to find the answer.
How is stress and physical illness alike? How are they different? Can they tie into one?
Stress does in fact have a direct effect our physical health and well being. This is also why there has been a dramatic rise in the incidence of certain diseases, now termed as stress related disorders. All of these conditions are directly influenced and affected by stress and anxiety. Coronary disease, insomnia, panic attacks, obesity triggered by stress induced overeating, etc. If you examine stress disorders you will find that some are directly caused by stress and directly aggravated, while in others the effects are indirect. The disorders affected indirectly are so vast that it becomes obvious that stress has far reaching effects on almost every aspect of our physical health. The extent of stress disorders can not be summarized here, so I'd advise you to check the resource links.