Not known: It has not been scientifically proven that stress causes cancer. Some viruses cause cancers, so it is possible that stress alters the way the body fights off or deals with viruses, and could make one more susceptible to developing cancers. Stress can alter the function of the immune system, perhaps making it harder for the immune system to detect and destroy mutant cells before they reproduce.
Answered 10/7/2011
6.3k views
Stress: Stress is a negative immunomodulator meaning it decreases the effectiveness of the immune system which slows healing and immune response among other things. There are some who believe it can contribute to worse outcomes in any disease and maybe increase the risk of disease. You will be healthier overall if you learn stress reduction techniques [yoga, meditation, etc].
Answered 4/8/2015
5.8k views
Unclear: The evidence on this is unclear.
Answered 4/4/2013
5.2k views
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