4 weeks post-op Tear Trough Injections, is this bruising normal? (photo)

I recommend getting an evaluation to determine cause. This could still be bruising which can take several weeks to resolve, but it could also by Tyndall, which can be reversed with hyaluronidase. I recommend using cannulas with tear trough injections to reduce the risk of swelling and bruising. See an expert. Best, Dr. Emer

Thank you for sharing your question and photograph.  Depending on how significant your bruising was after the injections you may still need to allow more time to pass for the residual discoloration to resolve.  I do not think this appears to be a Tyndal effect.  See your injector for an in-person evaluation to discuss your current results.   

The skin around the lower eyelid bruises very easily. The skin is also very thin. Improper product choice or placement in this area can cause the product to be visible and appear as a bruise. At 4 weeks after the injection your bruising should be nearly, if not all, resolved. Treatment with a VBeam Perfecta laser can help bruising dissipate faster. Sometimes hyaluronidase is needed to dissolve some of the visible product that appears as a bruise. Check in with your injector to have it assessed and treated if necessary.