A youthful appearance has been a coveted goal since ancient times. With the development of science and technology, the use of filling materials can effectively and safely fill the depressions and get the perfect curves, and for those who are discouraged by surgery, the introduction of hyaluronic acid has given them a new option. Hyaluronic acid exists in large quantities in the connective tissue and dermis of the human body and is a transparent gel-like substance that absorbs water and is said to be the moisturizing factor of the skin. Compared to collagen molecules which can only carry thirty times the water, hyaluronic acid molecules can carry more than five hundred times the water and is recognized as the best moisturizing product in the literature today …… The hyaluronic acid used in injections is a purified ingredient that will fuse with the original hyaluronic acid in the body after injection, and the skin will expand and wrinkles will flatten and bulge, making it extremely safe. It is extremely safe. Hyaluronic acid will be gradually absorbed by the body after injection, and the effect can be maintained for 6-8 months each time. It has been widely used to fill nasolabial folds, tear troughs, apple muscles, frontotemporal depressions, and can also be used for nose tip and nose bridge repair, lip augmentation, chin repair, and scar depression correction. Before treatment, please keep your skin clean and any cosmetics and skin care products need to be cleaned. It is recommended to use cleansing lotion and astringent water to cleanse the skin. Use cold water to cleanse in order to facilitate the contraction of pores. You are strongly advised not to take anti-inflammatory drugs (e.g. aspirin, ibuprofen) for at least 3-4 days prior to treatment as its possible to exacerbate bleeding and swelling at the injection site. Hyaluronic acid injection does not affect normal work and life. After hyaluronic acid injection, please keep your face relaxed and do not make excessive facial expression movements. Avoid contact with high heat environment (e.g. sauna, high heat bath) for at least 2 weeks after treatment, as it may cause the hyaluronic acid injected in the face to be broken down quickly, thus shortening the duration of the filler effect. Do not touch or massage the injection site, and you can apply makeup normally on the day after the injection.