Why is There Swelling Behind Marionette Lines Filled W/ Juvaderm Ultra-plus?

It is normal to have some swelling after Juvederm, but in most cases I would say the swelling resolves sooner than a week afterwards.  If you had any bruising after the injection, it's possible the swelling could last longer.  Since you are still concerned about it, I would return to your treating physician and be examined.  He should be able to discern if the issue is from swelling from the injection versus too much Juvederm being placed.  If by chance there is an issue with too much Juvederm, there is a medication that can be injected to dissolve some of it.  

Swelling is a common reaction after filler injections, such as Juvederm. This inflammation generally subsides within a week or so, but this can vary based on injection site, amount injected, and other variables. However, each patient is different and you may have extended swelling a couple days longer. In the meantime, I would suggest icing and sleeping upright rather than flat to promote draining. If your swelling persists or you notice an increase in the swelling, please consult with your doctor.