Hyaluronic acid is a kind of hyaluronic acid, which is often used for injection cosmetic filling in medical beauty. Hyaluronic acid can be used to fill facial wrinkles, such as crow's feet, forehead wrinkles, brow wrinkles, nasolabial groove (decree lines), lip wrinkles, eyelid wrinkles and cheek wrinkles, and enrich lips, temples, chin and chin. Injection of hyaluronic acid must choose a formal professional plastic surgery institution, which is safer and more secure.