Chin or chin surgery is done to increase or decrease the chin size. The aim of this surgery is to achieve harmony with the rest of the factions; That is to say, to increase a little defined chin until it is able to give more strength to its personality, or that an excessively prominent chin is reduced by softening its factions.

In principle, the chin should be vertically below the lower lip. The chin augmentation is done by the implant of a small semisolid silicone prosthesis, which is placed on the chin bone.