i hate to ask such a noob question, but i cant find anything in the searches, and i dont want to take off my deteriorating door panels unless i really have to...

my door lock to my drivers door kinda froze up about a month ago. it feels like its something mechanical that is stuck, and no force of the key will turn the lock over. the passenger door started doing this last night, leaving my back window as the only option to break into my truck every time i use it.... the ignition still works great, but the locks just feel seized... anyone ever run into this?

danny