What exactly is the damage that can happen from Ulthera being done on the trachea?

Rest assured, Ultherapy is not able to penetrate deep enough to cause damage to the trachea. That being said, as a Facial Plastic Surgeon, I am performing facelifts on many patients that have had Ultherapy over the years. Some, but not all have very dense scar tissue present similar to what one would see during a revision facelift, but without the benefits of a prior facelift. I have grown much more skeptical over the years about the risk reward ration with energy devices in general.