High Intensity Focused Ultrasound vs Thermage for Skin Tightening

Non surgical skin tightening procedures are gaining increasing popularity these days, which makes use of one or more of the energy technologies like laser light, radio frequency, infra red light energy or ultrasound energy to heat the collage in deep skin layers to stimulate natural collagen production in the skin.
thermage treatment and HIFU are both popular treatments used for eliminating wrinkles on the face, neck or arms, loose skin that occurs after weigh loss on stomach and thighs, and loose skin after pregnancy etc. Both devices can cause collagen formation in the dermis to help tighten the facial features.
Thermage uses radiofrequency energy to stimulate collagen production. Thermage has applicators that are very small for use on eyelid skin and large ones for body sites such as arms, legs and abdomens. Its medium applicator is used for the face. HIFU has smaller and medium applicators but off facial sites are off-label and studies are ongoing. 
Thermage can achieve skin tightening results, but it is very difficult to predict whether the result will be substantial enough to produce a good result.
hifu uses focused deep ultrasound energy. HIFU is a very impressive device when it comes to results. HIFU is designed more for tightening of the deeper tissues as opposed to just the skin as with Thermage. Depending on the patients needs HIFU can target up to three layers of skin, 1.5 mm,3mm, and 4.5 mm in depth. Thermage only targets tightening. 
Both hurt but the discomfort is over when the energy is stopped from being delivered. These non-invasive techniques can help rejuvenate the skin tone but are not expected to give the same result as a facelift. They also do not improve the skin surface so don't expect wrinkles to be better. 
Overall, hifu therapy is better in facial jowl lifting, cheek lifting, forehead lifting and neck lifting than Thermage.