Under eye bruising after filler still visible 6 weeks later, is this normal? (Photos)

Thanks for your question and photo.  From your pics it looks like you have had good resolution in the left under eye area.  There is still some discoloration and it looks as if there is loss of filler in that area on the left compared to your one week pic. It possibly could be the Tyndell effect if some filler is too close to the skin.  This is where blue light is trapped by the density of the filler.  It would need to be reversed if it is and HA filler.  I would let your injector see it and examine it to determine that.  Most bruising will turn yellow with time and then disappear.  I have had one patient in which it did take abouit 6-8 weeks for full normal skin to return.  Hope this helps.
Dr. ODell

Most of the bruising resolved within 2 weeks. On occasion it may take longer if there was a significant amount of blood in tissue and the "cleaning" process is impaired. As we all experience from time to time, normal bruise undergoes many changes of color from red to purple, brown, yellow and green. This is related to degradation of hemoglobin contained in our red cells. One of the steps is creation of hamosiderine  with iron in the middle. The iron is poorly accessible to the metabolic process so the degradation process takes time. Eventually, the changes will resolve without any residual discoloration. 
Other options: post inflammatory hyper-pigmentation or filler related light refraction (Tyndall effect). Your injector should be of great help in advising you the next step. Good luck!