DMSO is sold at most larger vitamin stores. Sometimes the pure liquid can irritate the skin so try to gel with Aloe, it's more mild and has less of a fishy order. Remember though that it will make whatever you are using a lot more potent so start out at a much lower dose than normal to see how you react. Also remember it absorbed into your bloodstream, not just the effected area. Always make sure the area of application is clean and wash your hands thoroughly first.