Botox (Toxin) treatments work by relaxing overdeveloped muscles, helping smooth facial lines and reduce expression wrinkles. Fillers, as the name suggests, are used to add volume to areas of the face that lack fullness. Filler treatments can be applied to areas such as the forehead, chin, front cheekbone, cheeks, nasolabial folds, nose bridge, lips, aegyo-sal (under-eye fat), and under-eye area, helping enhance facial volume and balance.