What to Do when Restylane Won't Dissolve?

Hyaluronidase is a naturally occuring enzyme that is produced by bacteria to help them dissolve the hyaluronic that exists in normal tissues. This can be used to help dissipate the restlyane if that is the cause of your problem. Other possiblities include a hematoma with fibrosis.

It does sound that the heaviness more than one year after the Restylane could be caused by multiple reasons, which may not be Restylane.
You should see your physician for evaluation as most of the REstylane probably has dissolved by now. If it is the Restylane it would be an exceptionally rare situation that deserves an in-office examination.