Brief Answer:
Ok, several things.

Detailed Answer:
Cannot give particular information without being there. That Being Said, there are a few issues that are quite likely to be relevant to you.
1) Pain related to sick nerves can be quite tricky to treat. This generally requires either truly dangerous amounts of narcotics OR extremely safe amounts of "nerve pills". About any class of drug called a nerve pill has proven success in pain from sick nerves. These classes include:
anti-epileptics. Gabapentin is probably the leading drug here. Lyrica also
novacaine/lidocaine. Lidocaine patch is extremely effective if the nerve is near the surface and not very good if it is deep where the drug cannot get to it. HOWEVER, amitryptiline and nortryptile are anti-depressants with lidocaine like effects that can work in this context.
Spinal blocking drugs. Drugs that increase the level of stress hormones in the spine block pain signals. Amitryptiline, nortryptiline and cymbalta are in this category.
Tens unit
Botox, sometimes
Nerve ablation sometimes (this includes hot chili oil...cathepsin which is hot because it is stimulating and killing pain nerves).

2) narcotic effects complicate the analysis. Most researchers in pain believe that people become overly sensitized to pain if they receive narcotics. Pretty much everyone finds that the dose of narcotics needed to get pain relief goes up with continuing use (tolerance).
And finally, people with drug issues essentially always believe that it is something other than drug issues. Lying about drug use, using narcotics for feelings other than pain relief, having relationships/jobs/finances suffer in order to get narcotics are indications that something other than pain is involved.

3) Here are some doctors I was able to look up.
First, all the major hospitals in your area have pain management centers.
Second, the threads are looking like this is a huge issue in Montreal. Angie's list might be helpful. But the threads are converging onto the Montreal and the Jewish Hospitals.

---

Brief Answer:
several things.

Detailed Answer:
Ok... the best supported modality for this in the medical literature is exercise. They don't tell you why. Here's the thing. Exercise, or yoga, or being a dervish, or being a XXXXXXX Fakir all involve pain. You put yourself into a painful condition in a context in which 1) you are the active source of the situation 2) you can control the timing and the extent of the activity 3) you have a reasonable expectation of an overall gain from your participation on it at multiple levels and 4) there is a magical brainwashing effect of the context of group participation. Those are some ideas, I would also include ballroom dance which has been amazing to me. That is the well documented method in which they work. None of them changes the actual structures, much; and all change the nerve and brain function.
Physical therapy has other modalities but frankly they have less clinical support.

---