What causes the severe neck pain and stiffness while smoking meth? i know i should stop, so please just give an non judgemental answer. :-)

The destructive drug: You don't want any judgmental answer; but as a physician, i don't judge. But i can't comment without telling you that there are grave medical dangers to your meth use. It adversely affects the brain --exposes you to significant emotional+cognitive problems. Arrhythmias, increased blood pressure, carotid artery dissections, leading to neck pain and severe stroke. Tremors can also lead to neck pain.