The records should show what was used. If it was juvederm ,rarely patients can form thickening.At 5 years the options may be limited but hyluronidase can dissolve filler. This treatment needs to be customized.
Ask for a copy of your chart
If this was done 5 years ago, its not Juvederm. There is no telling what is in there. Ask for a copy of your chart for your records. Don't tell them why.
If there is any confusion about what the doctor used to treat and fill your lips please request a copy of the medical records. In those records it will document which filler was used and you can proceed from there. Please consult an expert. Best, Dr. Green