Decrescent lines are medically known as nasolabial folds, which is a furrow line located on the outside of the nose towards the upper lip corner extension line. When hyaluronic acid is used to fill the nasolabial folds, the phenomenon of displacement may occur for the following reasons: 1, facial expression is too rich: facial expression muscle squeezes hyaluronic acid, which makes the hyaluronic acid injected in the nasolabial folds move up to the malar area and can be relieved by reducing the amount of injection; 2, external force squeezing: improper sleeping position, or vigorously rubbing or pressing the injection site, such behavior should be avoided; 3, injection level: if the injection If the level of injection is deeper, it is more difficult to displace, if the injection level is shallow, pulling by the expression muscle can lead to displacement; 4, improper choice of hyaluronic acid: if the molecular quality of the filled hyaluronic acid is small and soft, the quality is poor, hyaluronic acid may be displaced, it is recommended to choose a regular hospital for injection, communicate fully with the doctor, choose the right hyaluronic acid to avoid the displacement of hyaluronic acid; 5, doctor’s technology: if the doctor’s technology is general If the doctor’s skill is general, inadvertently filling to the outside of the decrescent line, not only can’t solve the problem, but also will deepen the decrescent line, and hyaluronic acid will be displaced to other positions. If displacement occurs, the candidate can wait for its natural fading and apply hot compresses, or inject hyaluronic acid dissolving enzyme to dissolve it directly.