Hyaluronic acid injection in the lips is a very satisfying aesthetic procedure. A special hyaluronic acid is injected in the lips giving them a more youthful and firm appearance, always avoiding artificial and expressionless faces. To inject hyaluronic acid, a small needle or a thin cannula are used to reduce the risk of small haematomas. Mixed with hyaluronic an anaesthetic is used, usually lidocaine, which makes the treatment more comfortable. Thus, the procedure is virtually painless, requiring only a few minutes in the medical office, obtaining instant and natural looking results. One of the main advantages of hyaluronic acid fillers is that patients can immediately enter their work or social activities, with no downtime.