At present, hyaluronic acid is divided into many kinds, mainly including injectable and topical. Different types of hyaluronic acid are used in different ways, as follows: 1. Topical hyaluronic acid can be used as a maintenance product. Generally hyaluronic acid original maintenance products contain a higher concentration of hyaluronic acid, but need to be used with make-up or serum. Because the skin is dry when using hyaluronic acid alone, not only is it difficult to achieve a direct moisturizing effect, but it can even make the skin more dry because hyaluronic acid absorbs a lot of water from the skin. Therefore, it needs to be mixed with other products after facial cleansing in the morning and evening to achieve better results; 2. Hyaluronic acid injection is also a common beauty treatment. However, because hyaluronic acid injection is a medical beauty project, only qualified and licensed beauty institutions or hospitals can carry out this project. Beauty seekers should not inject on their own or go to unqualified beauty institutions for injections. Hyaluronic acid can be used not only for wrinkle removal, but also for lip augmentation, nose job and other shaping projects. However, within 24 hours after the injection of hyaluronic acid, beauty seekers should avoid touching the injection area, do not apply ice or heat to the injection site, and avoid doing strenuous exercise for a short period of time.