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.
Although it may feel like it, a headache is not a pain in your brain. Your brain tells you when other parts of your body hurt, but it can't actually feel pain. Most headaches happen in the nerves, blood vessels, and muscles that cover a person's head and neck.