[Jamougha]

Various studies have been done on it and they have failed to demonstrated that it works better than a placebo. The theory behind it has no apparent basis in fact.

Having said that placebos are pretty effective in dealing with pain, since pain is - after all - just in your head. It's improbable that it will accelerate your healing significantly; some things don't respond well to placebos. Chances are that you will get better soon anyway given that you have been injured for some time, so the therapist was pretty smart there. Still it won't do you any harm, except to your wallet.

DO NOT stop whatever treatment your doctor has prescribed. Anti-inflammatories are important in healing.