Does anyone know any thing about cheek augmentation and if kim k had it?

Generally fillers. As we age it is common to lose some volume in our face, including the cheeks. Various fillers are commonly used to restore volume to the cheeks- this is cheek augmentation. Common fillers for this area include restylane, (dermal fillers) juvederm, Radiesse and others. Sometimes one can have their own fat injected in this area. There is also surgical augmentation, which uses various implants. Many celebs do have it.