I thought the pipes had frozen when no water came out of the shower one day (it was -15 C or 5 F), but I left it open and ran a blow dryer over it until the pipes warmed up. It began to trickle a bit faster so I let it run until it was warm water, so obviously there wasn't ice in the pipes by that time. It's now April and warm outside, but even now, all that comes out is a few drops. I'm presuming that in the freezing, something jammed inside the faucet. Is this likely something I can fix without replacing the whole faucet (I don't even know how I'd get at it)? Can somebody help me understand what's happening inside the faucet?

Thanks,
Robin