Just had Restylane tear trough injections - how long does it take for the swelling to go down?

Typically the swelling will last less than a week, however 10-14 days is common as well.  Without pressure, you can apply cold compresses under your eyes to help reduce the swelling.  If you are noticing swelling after 14 days, I would schedule a follow-up appointment with your provider.  I would set the same standard for the lump under your eye; seeing your provider if it is still there after 14 days.  

Swelling usually goes down in a week, bruises take one to two weeks. If a lump, unevenness or contour problems seem to be lasting much longer than that, it is possible in most cases to smooth out lumps caused by too much or too superficial injection to be dissolved with hyaluronidase. This only works for hyaluronic acid fillers. Fillers such as Radiesse will not be dissolved and many months may be needed for a significant irregularity to diminish. Thin skin around the eyes makes doing fillers a delicate job. I do like the catheters that have blunt, tapered tips now, rather than needles. They are less likely to cause bruising.

Bruising and swelling is common when treating the tear troughs, I advise my patients to wait a full two weeks for the product to completely settle and bruising eliminate before seeing their final result