Hyaluronic acid injection for lip augmentation is a popular method at present, and the sequelae of lip augmentation by hyaluronic acid injection are few, because hyaluronic acid is one of the dermal tissues of human body, which will be decomposed by human body in about three years without long-term side effects; In addition, the operation of injecting hyaluronic acid for lip augmentation is simple, and the general process only takes about ten minutes; More importantly, the injected hyaluronic acid lip augmentation is evenly filled, leaving no prismatic or granular substances. The curve of lips after injection is better and more moist.