Sorry to hear about your injury, and I hope your recovery continues to progress well. Numbness and weakness are common after any laceration. That said, the specific location and orientation of your laceration is key, as delicate anatomy (such as the frontal branch of the facial nerve,...
When relaxation of the face is extreme, the ligaments that span from the skin down to the bone [ basically these hold your skin on your face] can become loose. In addition the skin appears loose because there is fat loss from the fat compartments of the face and there is a "deflation" effect,...
The ringing in your ears after your facelift may be a temporal coincidence. If your tinnitus persists you should see an ear, nose, and throat physician who will order a hearing test. You need to be evaluated with an accurate hearing test to rule this out as a cause for the tinnitus.