Mouth filling is an aesthetic medicine procedure. It uses hyaluronic acidwhich is applied topically to the lips. This treatment reduces lip asymmetry, low volume, dryness and improves lip colour. Filling the lips with hyaluronic acid is a quick and safe procedure, as this substance occurs naturally in the body, including in the vitreous body of the eye. As a result, this procedure is becoming increasingly popular, while also quickly producing the desired results in patients.