Your clients come to you for filler treatments because they’re a great non-surgical option to add lip volume and smooth fine lines and wrinkles. But like most non-surgical options, the treatment is temporary. The advancements in hyaluronic acid fillers have improved filler lifespan. Most good fillers last anywhere from a few months to a couple years. While all fillers are temporary, there are reasons your treatments may not last as long as expected....