National Standards: Out-of-Pocket Health Care. Disclaimer: IRS Collection Financial Standards are intended for use in calculating repayment of delinquent taxes. These Standards are effective on March 28, 2016 for purposes of federal tax administration only.
The chemicals released by the body when an injury occurs or when the body has other abnormal processes taking place actually make changes to the nervous system. The types of changes they make are related to the type of pain you feel.
If so, you've already discovered that pain -- like so many other things in life -- is deeply sensitive to stress. When you're under stress -- brief or lingering, mild or severe -- your body releases chemicals that change the way your brain senses pain. In some cases, stress actually eases pain. A strange sound in a dark alley can make you forget about your aching knee, a handy thing if you decide to run.