Under Eye Bruising 3 Months After Juvederm

It is extremely unusual to have actual bruising three months after filler injections.  It may be a Tyndall effect from the filler which gives off a bluish hue for superficial injection of the product.  An exam would be helpful.

After three months the bruising should have remitted.
It is possible that the Juvederm was injected too superficially. In this case it will have a bluish discoloration which can be interpretted as bruising. It can take many many months for this to dissolve. It seems like it almost sequested in this site.
Two possible solutiions would be the extraction of the Juvederm. After piercing the area, the material is literally squeezed out. This can be done, even after months of unwanted occupancy in the area. Another treatment would be the judicious injection of hyaluronidase into the area. This is an enzyme that will melt the Juvderm away.
Incidentally, it seems to me that this problem is more likely to occur with Juvederm than Restylane. If you are still game for this sort of injection in this area in the future, Restylane would be the filler I would opt for.