I suspect trigger finger on middle finger. is it possible for it to be fine one day then lock the next? or does it lock and stay locked? tender, swell

Trigger finger comes: And goes often before it is fully established a constant there different grades of trigger finger from mild crepitus without locking to a fully locked finger. We use a classification named after Quinnell. To grade these 1-5. Many with intermittent symptoms don't seek treatment once they understand they often will get treated if frequency of locking gets in the way of activity. See hcp to confirm