Lots of patients have their filler dissolved, often to erase the previous work and get back to a blank canvas. Once the filler is completely dissolved and swelling has subsided – usually after about two weeks – it is safe to have filler injected again in the same area. Product migrations is a common reason for filler to move into other areas, a patient's anatomy and how it functions will play a large role on where and how filler will settle. Other reasons including lumps and emergency reversal, this is where hyaluronic acid fillers are considered safer than other fillers on the market as we have the antidote to reverse them known as Hyaluronidase. An emergency case is where filler in unintentionally injected into a blood vessel.