Since stress reduction is one of my specialties, this link gives the basic negative health impacts on your life.
“We don’t know why, exactly. Stress can directly increase heart rate and blood flow, and causes the release of cholesterol and triglycerides into the blood stream. It’s also possible that stress is related to other problems — an increased likelihood of smoking or obesity — that indirectly increase the heart risks.
Doctors do know that sudden emotional stress can be a trigger for serious cardiac problems, including heart attacks. People who have chronic heart problems need to avoid acute stress — and learn how to successfully manage life’s unavoidable stresses — as much as they can.”