Sounds like it's plugged-up internally, or that some internal part has broken - or frozen. Taking it apart should let you know for sure, one way or the other.
Sometimes during winterizing, they'll miss a faucet. They forget to open the faucet and let the pink anti-freeze run out, allowing some residual water to remain inside the faucet, where it freezes and breaks something inside it.
Taking it apart and examining it is the only way to find out for sure.