Why is it...

Why is it that every time I go to the dentist, my teeth hurt afterwards? I actually like going to the dentist (I'm a little weird, I know), but it seems that my teeth ache or "feel funny" after going there, even if it's only for a cleaning. I consider myself "dentally fortunate," in that I've only had one filling in my life and I've never had braces. But I still want to know why my teeth feel funky after a simple cleaning... I can't seem to figure this one out! :-)