The shape of the jawline can be affected by the shape of the masseter muscles, sagging skin and fat. Each of these issues requires a different treatment for effective resolution. For prominent masseter muscles, Botox can be used. For loose skin and fat, ​energy ​based treatments can be used.​ Deoxycholic Acid Injectable and Cryolipolysis Non-Invasive Fat Removal may also be used to reduce excess fat under the chin.