Found this info on a post in another MMJ forum:
Marijuana can be used topically (on the skin) to relieve pain from certain conditions. The medication can be a balm, lotion, ointment or rubbing alcohol solution. This is not a new use for marijuana. In fact prior to the time when most medication became available and people only had plants to use for medication, many patients would soak marijuana leaves in alcohol and apply them as a poultice to an arthritic or swollen joint. It is not known how the topical treatment works as researchers have not fully studied how the medication passes through the skin. Although much research is needed, what we do know is that many patients find pain relief through this method and even think there is an anti-inflammatory effect. Patients with arthritis, muscle and joint pains can testify to the ease of the aches and pains that they feel on a regular basis. Topical marijuana preparations provide only local relief and do not have any effect on the brain (there is no high). This is helpful for those times when marijuana use is inappropriate (like when you have to drive your car) and you still need pain relief! Topical preparations can be purchased or home-made.
