Hyaluronic acid, also known as hyaluronic acid, is one of the main matrix components of the epidermis as well as the dermis of the human skin, and it has more uses, including wrinkle injections, facial fillers, and for skin care products. 1. Injection to remove wrinkles: hyaluronic acid contains a lot of water, which can be injected into the local skin to help the skin from the body and the surface layer of the skin to absorb a large amount of water, increase the skin’s ability to retain water, so that the skin to restore the elasticity and luster, so as to play a role in removing wrinkles. It can be used for the wrinkles around the mouth, the lines around the mouth, and the facial wrinkles. 2. Filling the face: In addition, hyaluronic acid can also be used to fill the pits caused by some acne scars, scars caused by trauma and surgery, congenital defects, such as hyaluronic acid lip augmentation, hyaluronic acid injection of the apple muscle, hyaluronic acid rhinoplasty, etc., are through the hyaluronic acid material injected into the depressed areas, prompting the local skin to be more plump. 3. Used in skin care products: Hyaluronic acid can also be used in skin care products, can play a unique role in protecting the skin, can keep the skin moisturized and smooth, delicate and soft, and can play a role in anti-wrinkle, anti-wrinkle and so on. So in a lot of skin care products are added inside the hyaluronic acid ingredients. During the use of hyaluronic acid, some patients are prone to hives, pruritus, local pain, swelling and other adverse reactions.