Based on your photos and post, I agree that you have a superficial thrombosed vein in the area and I think its due to the filler rather than a nicked vein. The good news is that it should resolve on its own and I do not believe it poses any immediate risk or threat to you. You can always try...
If there is filler still present you can elect to have it dissolved with hyaluronidase. If you were overfilled there may still be filler present. Your injector can check for migration as well. To keep your skin looking refreshed we recommend using medical grade skin care products like...