Thank you for your question about chin movement and how it affects the overlying skin. I would not recommend any surgery. Often people merely think about relaxers such as Dysport, Botox, Juveau and Xeomin as simply helping to flatten out lines or wrinkles. I like to think of relaxers as part of my palette of sculpting tools. In some ways they are a bit like an eraser. Wherever muscles are more active than we want, we can place relaxer in varying dosages and depths to achieve a particular sculpted effect. For example, people who grind and clench their teeth often have thickened masseter muscles towards the back of their jaw in front of the ears. As seen from the front such strength and bulk of the masseter muscles serves to widen and masculinize the face. We can slim the face in a well thought-out crafted manner in order to change the function (e.g. reduced grinding) and appearance (slimming, feminizing). Similarly, relaxers can be used to treat the chin complex of muscles which will bring about a change in how the skin moves and sits. There are a good number of muscles in the chin, such as the mentalis, depressor labii inferioris, and DAO-depressor anguli oris. Treatment of muscles is not an all or none just inject it kind of a thing but rather it is a very customized. For example some muscles such as the labii inferioris are likely going to be specifically avoided, which in itself a form of sculpting treatment. Keep in mind that results from relaxation are seen over weeks and months and may continue to improve for a very long time providing the treatments are kept up. Treatments may want to be repeated every 3-4 months. Good luck.