body massager for home use

What is the working principle of body massager for home use HIFU is short for High Intensity Focused Ultrasound. It is a non-invasive way to remove wrinkles, face lifting, skin tightening, etc. High-frequency vibration causes transient heat. Subcutaneous tissue absorbes heat and makes skin tissues cells regrown. HIFU heats directly to deeper tissue. Ultrasound gel need to be applied to skin. What is the application of high quality intensity focused ultrasound hifu ? 1.Remove