Chin dimples are a common cosmetic concern that some people find unattractive. An overactive mentalis muscle, which controls the movement of the chin, is typically to blame for them. This muscle pulls the skin and creates a small dimple on the chin when it contracts.   Some people are born with dimples in their chins, while others may develop them with time as a result of aging, weight gain, or certain medical conditions. Skin stretching in the chin area can cause dimples, for example, due to excess fat. The development of chin dimples can also be influenced by hormonal imbalances caused by thyroid disorders.   The presence of dimples on the chin is generally harmless, but they may cause some people cosmetic concerns. It is, fortunately, possible to reduce their appearance with treatments. An example of such a treatment is Botox injections. Botox can smooth out the chin contour and reduce the appearance of chin dimples by relaxing the mentalis muscle. In addition to Botox, other treatments for chin dimples include dermal fillers, liposuction, and chin implants.