2. Hyaluronic acid can remove eye bags for 4-8 months (collagen has a short action time). Although the effect is not permanent, the injection time is short, the recovery time is short and the side effects are few. Hyaluronic acid bags under the eyes need lacrimal groove and risorius, and the injection amount is relatively large. For some complicated situations, it takes 2-3 operations to achieve perfect results. Hyaluronic acid is not only effective but also safe and reliable. Its disadvantage is that the effect is not lasting enough, and it can only last for about 6 months.