I received this stuff as a gift. Have not tried it on muscle pain but I did put it on my poison oak just to see if would do anything. I was surprised that after about three hours all the itch was gone. Did not come back, poison oak dried up after a few days as normal but the itch did not return. Tried it again when I got poison oak on my finger. Same result! Itch gone after a few hours, did not return. I don't know if it helps with muscles but works for me on poison. I'm allergic to mosquito bites, they itch badly! Gonna try it on those next.