Lidocaine is mostly for topical pain relief. It might help, if you have a lot of recruitment pain associated with the back injury. Mostly it's for things like shingles. The outermost part of your spine is a good 1 1/2" deep. The lidocaine is not likely to penetrate that far, so a bulging disc or ruptured disc would not likely be affected. However, your personal response is your response--- use whatever works!
