http://www.cnn.com/2012/08/01/opinio...kes/index.html
I totally agree with this.
Many Americans are over-tested and over-treated.
This article doesn't touch on one of the major reasons for this: Our current health care system provides great financial incentive for this, as expensive (and often easy-to-perform) tests are the most profitable area of medicine. It is to a doctor's financial benefit to prescribe as many tests as possible, even ones he does not perform himself. Many unethical doctors perform completely unnecessary tests simply to make money, and there are even scammer doctors who bill insurance companies and Medicare for tests that were never performed! (The latter is especially common for senior patients.)
My brother, who is a doctor, actually told me that current medical diagnostic equipment is so advanced that it sometimes allows doctors to "see too much". That is, often they end up seeing harmless or temporary conditions that can falsely appear to be serious problems, leading to unnecessary surgery/treatment, and sometimes complications or death.
People should also be aware that every surgery and medication comes with a risk. If you feel that your body can heal on its own, it's best to stay away from any form of treatment. Many doctors push surgery/treatment because, again, they want money.
I'm not saying to avoid all treatment and surgery, but you should always do your own research and decide if you really need it.