Smoothing Skin with Juvederm
Without knowing what your exact concerns are, we are assuming that you may be referring to the use of Juvederm for fine lines, minor depressions, etc. Hyaluronic Acid dermal fillers are an excellent option for smoothing the topography of the skin with a natural appearance.
Juvederm for Skin Patches
Please clarify what you mean by "skin patches". Juvederm is used to add volume and fill depressions but does nothing for skin pigmentation.