if you have epsom salts, see if she'll let you soak the paw. we usually mix up the epsom salts in a plastic container--like a cool whip container--and then have the dog stand with the affected paw in the solution. 5 minutes is ideal, but if we can get them to stand for even a minute, it usually helps.
a little dab of triple antibiotic cream might also help soothe it.
have you checked to see if she's got something imbedded between the pads?
if it doesn't improve in a few days, or if it looks infected, probably best to have a vet look at it.
oh, and we'd love to see some pics of your pup if you have some to share?