I actually found a pebble under the valve stem, for our cold water tap, for our wash machine. Looks like the OP is going to have to shut water off, then remove the valve stems and see what is going on. Best case scenario, need to change them out. Worst case scenario, you get to tell the significant other, that you are going to be busy, so you are unable to go do something with them.
__________________ Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?