In general, hyaluronic acid filler facial can last about 0.5-1 year. However, the duration of hyaluronic acid facial filler may also vary depending on each person’s physique, daily care methods and the type of hyaluronic acid injected. Hyaluronic acid facial fillers are mainly filled in the forehead, temporal area, nose root, jaw, eyebrow arch, lips and cheeks to achieve increased facial volume, reduced skin wrinkles, increased elasticity, as well as changing facial shape to make patients more refined and youthful. Usually, hyaluronic acid can be divided into large-molecule hyaluronic acid, medium-molecule hyaluronic acid, and small-molecule hyaluronic acid. Large molecule hyaluronic acid will be harder and last longer, lasting 6-12 months. The small molecule hyaluronic acid will be less hard and will last shorter, maybe only 5-8 months. In addition, good post-operative care is also needed to make hyaluronic acid fillers last longer. 1. Facial swelling may occur after surgery, which is generally normal and need not worry too much and can generally subside on its own. If the facial swelling is obvious, there may be rejection or allergic reaction, which may lead to repeated redness and swelling of the filler area, and it is recommended to take oral anti-allergic drugs under the guidance of the doctor to relieve it; 2. Avoid getting water on the surgical site within one week after surgery, or applying irritating cosmetics on the surgical site to avoid affecting the filling effect; 3. Pay attention to a light diet after surgery, quit smoking and drinking, and avoid spicy and stimulating food to avoid affecting the wound recovery. In addition, pay attention to avoid allergic foods and allergens to maintain the filling effect; 4. Patients should pay attention to quiet recuperation after surgery and avoid strenuous activities to prevent adverse effects.