Due to the differences in individual lip shape, injection components, and body absorption, there are differences in the specific maintenance time of lip augmentation with toothed lips, and most people can keep it for 3-6 months after surgery. Clinically, the lip augmentation effect is mainly achieved by injecting autologous fat and hyaluronic acid into the lips, with the main emphasis on lip augmentation. The effect of lip augmentation by hyaluronic acid injection will be obvious, but the human body will absorb hyaluronic acid, and the absorption rate is related to the metabolism of the body and the stability of hyaluronic acid, so each person keeps the effect for a different time. In addition, there is a fat survival rate for lip augmentation by injection of autologous fat. If the fat survival rate is high, the postoperative effect will be maintained for a longer period of time; if the fat survival rate is low, it may need to be injected again in a short period of time to achieve satisfactory results. After lip augmentation for a short period of time, do not apply hot compresses, do not eat spicy and stimulating food, try not to let the lips touch the food when eating, and move the lips less.