After Restylane, I Now Have a Vein Between my Eyes That Sticks out when I Smile. Is This Part of the Bruising Process? (photo)

If the prominent vessel came after the Restylane injection, then it can't be normal.  It is possible the Restylane is affecting the engorged blood vessel.  You should contact your physician immediately, or another oculoplastic surgeon.

Hi Firefly.  It would be impossible to tell without the before picture to know what to think of the vein in your forehead.  It is certainly apparent in the photo and it's possible that the product injected could have led to a partial closure of a blood vessel that is causing this.  Your best bet is to see your injector again to rule out anything like this effect.

Sorry for a 2 to 3 days response rate. But you need to seek medical attention to be safe. Not very usual to see this vein issue. 

There is a vein that runs at the junction of the nose and the orbicularis oculi muscle surrounding the eye.  If the filler is placed close enough, the vein may become compressed and not drain as well as usual, creating  the bulging that you describe.  This is not part of the bruising.  A bruise does not get larger or smaller with smiling. 

I recommend returning to your injecting physician for a re-evaluation.  You may need a small amount of hyaluronidase injected in the area to lessen the amount of filler and to decrease the vein compression. 

Restylane, like any soft tissue fillers and needle based therapies, can cause bruising.  The vein, that you describe, should not be affected by the Restylane unless it was injected close to the vein IMHO.