Psychological stress causes inflammation, which is a hallmark of most diseases, from obesity and diabetes to heart disease and cancer. Having effective stress management tools is therefore important for optimal health
A study done on mice found that when the animals were chronically stressed, their lymphatic systems underwent changes that allowed cancer to spread more quickly and easily
The stress hormone norepinephrine can increase the growth rate of cancer; epinephrine has also been found to cause changes in certain cancer cells that make them resistant to cell death