Just to let you know, I've used weed for pain relief in my back and neck for a couple years. it worked amazingly for the first year and a half, then it stopped working, now it actually makes the pain worse (hence I'm stopping all toking till christmas and my tolerance is back to zero). So just a word of warning, don't use it every day as a sole means of pain management (as I did) of you may ruin the good effects.