Hyaluronic acid has the ability to moisturize and hydrate the skin, fill in facial depressions and prevent aging, and can be used in clinical aesthetic procedures. However, some patients may experience skin allergic reactions and pain and swelling when using hyaluronic acid. Hyaluronic acid has the function of moisturizing and hydrating, increasing skin elasticity. It can keep the skin moisturized, smooth, delicate, soft and elastic. Hyaluronic acid can also be injected in the form of filler into the facial folds and depressions or the parts that want to be plumped up, such as lips, cheeks, bridge of the nose, chin, temples, etc., which is suitable for the people who need facial fine-tuning. However, due to individual differences, some patients may experience adverse reactions such as skin itching, pain, swelling, edema, and localized pressure and weight sensation. It is recommended that if patients have the need to use hyaluronic acid, they should take into account their own situation and use it under the guidance of a professional doctor.