Although many young women and men state that they need aesthetic applications today, the age limit for all non-surgical aesthetic procedures is determined as 18. Previously, our face and body were considered to be in the developmental stage. In this context, the lower age limit for applications with hyaluronic acid-based dermal fillers, including chin filler applications, is 18. There is no upper age limit for this procedure. Jawline filling applications are among the applications that continue to maintain their popularity in the face of increasing demand. For this reason, some clinics can say that they do this practice to people under the age of 18, which we can call under the stairs. However, it should be known that applying fillers to people under the age of 18 is not only legal, but also has negative health consequences.