After doing Ultherapy today, I walked out the office with lines & marks all over my face. How long will these lines last?(photo)

This is a normal reaction that can happen post Ultherapy.  This typically occurs with the most superficial 1.5 mm transducer. These marks can last anywhere from a few hours to a week and will resolve.  Temporary side effects of Ultherapy are flushed skin, swelling, tingling and tenderness. Although uncommon, temporary mild bruising and numbness are possible.  
In order to maximize the positive inflammatory response created by Ultherapy avoid the use of anti-inflammatory medications such as ibuprofen, naproxen and Celebrex for 1 month following the procedure. This inflammatory response is necessary to allow your body to stimulate collagen fiber formation and modeling.
To maintain and maximize the results, I recommend a
prescription strength skin care regimen. Medical grade skin care
products stimulate collagen production from the outside- in, which can potentiate the effects of your Ultherapy treatment.

Sometimes when the most superficial 1.5mm transducer is used it can cause welting similar to your picture. We have not had this happen on the face, but I have seen others with it. It should get better in a few days. If it doesn't then you need to follow up with whoever did your treatment.