Hi Mrs. Kitty,
How is Chester and Mr. Dillion (Gunsmoke reference)?
It is not common to have welts with lines after Ulthera treatment. This occaisionally may occur. It results poor or improper contact of the transducer with the skin, or from repeated energy placed in the same spot. Fortunately the welts respond very well to ice, and usually disappear within 10 to 20 minutes. The longest that I have heard welts lasting is about 1-2 days. The lines are the "lines" from the individual Ulthera pulses. The skin may be red for an hour or two after treatment, but we have not seen any rashes in our practice.
The only other side effects of Ulthera that I am aware of are temporary muscle weakness around the mouth, the longest that I have heard it lasting was about 3 weeks, and I have seen one burn in a patient treated elsewhere. The burn was a line on the cheek that eventually healed without a significant scar. As with all aesthetic treatments, be sure to choose your treating physician most carefully. See video reference below!
Good luck and be well.
Dr. P