Review (4/5): works but may give you a headache
It's potent. It alleviated my frozen shoulder pains somewhat when I slept, but it also caused headaches so I had to return it. This isn't a knock against this product: I believe I just don't get along with DMSO for me. just It may or may not do the same for you - I'd say it's worth trying out. It definitely smells pretty good.
As for my frozen shoulder, nothing really helped (I tried a LOT of stuff), until I received a cortisone shot which allowed me to finally get some decent sleep (on my back and other arm's side). I'll still need to get surgery though since my scar adhesions are so thick they won't go away on their own.