Can Juvederm Leak After a Month?

Juvederm is highly unlikely to "leak" following a lip injury. Juvederm is a clear gel. It tends to stay in place following injection. I have never seen Juvederm or any other hyaluronic acid filler product leak following an injury of any variety. If it were to leak you would see a clear gel like substance. If you have any concerns, please return to your injector to be evaluated.
Best,Stephen Weber MD, FACS

Juvaderm is a hyaluronic acid filler and becomes incorporated into the surrounding tissue several weeks after it is injected. Yes, it is true that it can be extracted a month later, but this would need to be done with an incision and is very difficult to extract the material. So, a trauma with a lacderation to the area a month after injection will be unlikely to cause your juvaderm to leak out. If it did leak, you will see a clear, thick material, but again this would be very very rare.

Not to worry, a small wound cannot cause the products to leak.  After 2 weeks the filler has attached itself to surrounding tissues and will generally not move.