It is safe to have Ultherapy on your face or neck after a total hip replacement. However, I would make sure you have fully healed from your hip replacement before your Ultherapy treatment. For optimal results, you want to ensure your body can focus its resources on neocollagensis (collagen production) from the Ultherapy treatment versus healing post hip replacement surgery. Contraindications to Ultherapy are open wounds or lesions, severe cystic acne in the treatment area, or implanted active devices like pacemakers or defibrillators near the targeted area.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 typically potentiate the effects of your Ultherapy treatment.Good Luck!