Current meaning. At the end of the Mexican flag history, certain symbols and meanings were agreed upon. The new meanings of the colours are fairly recent: Green is hope, white is unity, and red is the blood of heroes. These meanings are not enforced by law, so they may continue to change.
Annular tear and irritated spinal nerve root. Selective nerve root blocks are one of the most commonly given spinal injections. They can be used to treat or diagnose back and/or leg pain due to damaged nerve roots. A nerve root is a collection of nerves that have branched off the main spinal cord on their way out to serve the rest of the body.
The most common one is Lovenox, but some people can't take Lovenox. I use one called Arixtra, when I need it. Both Lovenox and Arixtra are shots that you give yourself at home. Arixtra is a once-a-day injection; I'm not sure if Lovenox is given once a day or twice a day. A doctor or nurse can show you how to give yourself the shots. The injection will make a blue spot under your skin that looks like a bruise, but it is not painful.