I have it in my back...spread there after a lumbar sympathetic block. It's been almost 2 years now and it really sucks. I highly recommend desensitization therapy...I was miserable until I did that for my back. It's an awful process but so worth it in my opinion because afterwards I could start to sit more normally, wear more normal clothes, etc. Hot baths with epsom salts at least once and sometimes twice a day, as well as lidoderm patches with heating patches...especially when I have a bad flare. I also bought a Columbia omni-heat shirt (serval sizes too big) for the winter to wear under everything. Just helped keep me warm since the cold causes so much pain.