Water needle is a commercial name called autologous collagen regeneration technology. With the help of the special hydrodynamics and tension characteristics of water needle and physiological saline, it acts on the fascia layer from single point to line, and finally forms a reticular exfoliation cortex, which reactivates the skin tissue after minimally invasive surgery and produces a large number of autogenous nutrients during the regeneration process. Various growth factors, collagen, fibroelastin, etc. It has strong vitality, thus achieving the effect of regenerating and repairing tissues. Its outstanding technical advantages are mainly