Nanchang Pengai Plastic Surgery Expert: Hyaluronic acid is an immediate cosmetic method, but it has no flaws. It can be used in many ways. Simply put, you can call wherever you want, right away. You don't need a recovery period after playing. Temporary slight redness, swelling and itching may occur after injection of hyaluronic acid, but these maladjustments usually disappear after a few days. Hyaluronic acid has few side effects, and it is not protein, so the probability of allergic reaction is much smaller, and it is easily decomposed by human body, so it has no long-term side effects on human body.