It is quite common to have some swelling after Restylane injections. Normally, this should only last a few days, so if it doesn't seem to be going down, you should definitely see your treating physician.
Swelling or bruising can happen often after Restylane injections. I would ice the treated area to reduce swelling and take Arnica to prevent bruising. The swelling should resolve over the next week. If anything seems still uneven or swollen you should return to your treating physician to discuss and evaluate.