Do you have any ideas if this is a bruise or broken vessel from Juvederm? (photos)

Hello and thank you for your question. While it is difficult to make an assessment from images alone, it does appear this mark is a bruise from your injection. I would guess it will fade within two weeks. If it does not subside, I recommend you see your injector for a follow-up evaluation to determine whether additional treatment might be needed. 

If this is a bruise it should fade over a couple of weeks.  If you are not seeing improvement the vessel can be treated with a laser to help improve the look.  Return to your injector two weeks from treatment for an evaluation if you still have concerns.

Presumably there was nothing wrong with your lip before injection. Therefore this probably represents a leakage of some blood from a pierced blood vessel which is called a bruise. Should resolve in about 2 weeks. It is impossible to do lip injections without getting a bruise now and then.