I've done trigger point injections a few times, i have had them done by a crap doctor that made me scream bloody murder with each injection, and I've had them done by a very skilful doc which almost made it feel like nothing due to pain I already get.

Both times I got pain relief after a few days of being sore at injection sites but they only lasted max two weeks and at worst it lasted only a few days. The thing about getting these injections is you can't have them too often (my first doc only allowed them once in three months!!!) if they contain steroids and most likely they will, the lidocaine is only going to last a shorter time if it didn't have steroids to back it up.

I would say its good for a quickie relief but nothing good long term can come out of it, but great for those this works for!!