Juvederm in Nasolabial folds - vertical visible "worm-like" line and bruising. (photos)

Thank you for your question and for submitting your photos.  There are a variety of techniques used to inject the nasolabial folds (NLF) - I personally inject from the top the the bottom for most patients, but I have also seen many injectors inject from the bottom to the top.  Unfortunately, some of the most common side effects of cosmetic injections are swelling and bruising.  I often prefer to use a blunt cannula in the NLFs rather than a sharp needle to minimize the risk of bruising.  Furthermore, Juvederm itself can feel hard or rope-like initially after injection - over the course of a few weeks, the filler should absorb water and gradually soften and blend into your skin.  I would recommend scheduling a follow-up appointment with your doctor to discuss your concerns.  There are lasers that can be used to help bruising fade faster - in our clinic, we offer this service complimentary to any of our filler patients who experience bruising after treatment.  Your doctor should also be able to massage the Juvederm, if needed, to help it better blend into your skin.  Best of luck!

Juvederm can be injected in many ways and every way is correct if the outcome is good. 
Looks like you have a bruise and it's a bit difficult to tell if you have anything more than that. I would have you treating doctor look at you sooner. 
Good luck from NYC.