On occasion dermal fillers may yield an undesirable result or you just want to dissolve lips for example and start again due to filler migration or over filling. Unless in an emergency situation, electing to dissolve is a planned procedure. A consultation is required and a potential patch test for the hyaluronidase, the filler dissolving agent. If seeking further filler in the dissolved area a period of at least 2 weeks wait is required. More than 1 session may be required.