Personally I wouldn't. Your skin absorbs anything it can. And I'm not sure about the intense heat. I'd maybe try a hot pad or something along those lines. But that's just me.
I use something like Icy Hot. I use BioFreeze....I know you can get it at CVS. It is a little more expensive but it works great and you can use it while you are prego. My husband gave me the go ahead and he is an ob/gyn doc so I think I am okay......but you can never be too sure so I dont' think there is any harm in using it once and then calling your doc's office tomorrow morning and just make sure. Goodluck! I hope you feel better!
Re: icy hot?
my chiro recommended i use it for my hip and my ob said that was no problem