And yet another: Dimethyl Sulfoxide can be used to (cheaply) treat a ton of different things, but has been blocked by the FDA for use in all but a very small number of cases (bladder pain syndrome). Amongst other things, is extremely good at reducing swelling without the use of steroids, and is often used in gel form to treat inflammation.

If you want to use it, though, you have to leave the US or have a veterinarian as a friend. An acquaintance of mine gets DMSO gel used on horses to treat inflammation from a vet and uses it to reduce swelling in his back (has had multiple major spinal surgeries).

The common conspiracy theory is that DMSO is too cheap and treats too broad a category of ailments, so drug companies are lobbying against it with the FDA any time it comes up, as it would jeopardize the revenue streams from steroidal anti-inflammatory drugs, painkillers, etc.

https://en.wikipedia.org/wiki/Dimethyl_sulfoxide#Medicine http://www.dmso.org/articles/information/muir.htm