When the ultrasonic scalpel finishes the facial depression, it is mainly because the ultrasonic scalpel hurts the subcutaneous dermis, and the collagen fiber layer in the dermis plays a supporting role for the skin. No matter the collagen consumed by ultrasonic scalpel, hot Maggie, photon rejuvenation or laser laser and hot drawing, when the collagen produced by itself is insufficient, it will lead to the situation that "the new generation is not equal to the old one", and the skin depression will also be formed. In addition, less and less collagen not only causes the lack of "cement" in the dermis, but more importantly, the "Optimus Prime" collagen fiber network that supports the elasticity of the skin will also be fragile and broken. It is manifested in the depression on the surface of the skin, and the lack of skin resilience and gloss. Therefore, the postoperative repair and maintenance is actually very important when doing ultrasonic scalpel. Usually, in order to avoid the injury after ultrasonic scalpel, regular hospitals and beauty institutions will repair the damage of subcutaneous dermis with cortex restorer in New Muscle Drink and refill the depressed parts.