RF skin tightening works by gently heating the dermis, the deeper layer of the skin, to stimulate collagen and elastin production and trigger natural tissue remodeling. Using bi polar radiofrequency combined with light energy, treatments like Sublime precisely deliver heat to the target area while bypassing the epidermis. This allows effective tightening and smoothing without damaging the skin surface. Fine lines are softened, facial contours appear more defined, and overall skin texture looks smoother and more even. Because the top layer of skin is left intact, treatments are more comfortable, require little to no downtime, and are safe for all skin tones.