MEDIfraction targets the water in the skin tissue, generates a certain amount of hot stripped energy. The heating effect makes collagen contracted. The hot solidification and hot stripped energy forms minimally invasive puncture about 0.10 mm in diameter, about 2-4 mm in depth, then the thermal bridge is produced between traumatic holes. Thus starts the skin wound repair mechanism, a lot of new collagen is produced, then the frame structure of derma is reconstructed, facial contour sculpture, and wrinkles disappear, the skin become delicate, the acne and scar is smoothed.