Grate the rind of two lemons and place them in a mason jar.
Fill the mason jar with olive oil and let the lemon sink into the oil.
Seal the jar and allow it to stand for 2 weeks.
After the 2 week period is over, pour a small amount of the mixture onto clean gauze and place gauze over the area where a joint is causing you pain.
Place a plastic bag over the gauze, and a wool scarf on top of the bag to keep in heat.