Swollen in the forehead after injection with filler (Photo)

From the photos that you have provided it appears that your injector has created a hematoma by hitting the supra trochlear artery.   The artery runs from the corner of the eye to the scalp and is deep to the frontalis muscle in that area.  Only time, not dissolver will take care of that.  

I'm sorry that you are experiencing this problem. The swelling seems a bit too much and the dark spot in the middle of your forehead is concerning. Vascular compromise is a possibility given the location of your injection. I would have your doctor re evaluate you again to make sure this isn't more serious than temporary swelling of your forehead. The dark discoloration under your eye looks like a bruise and will go away in a few days. 

If it Hyaluronic acid, it can be dissolved with Hyaluronidase.  It happens pretty quickly (almost immediately).  It is available through your physician's office.

Steroids will only help with swelling , Vitrase or hylauronidase will dissolve or reverse a  filler . The main concern is vascular compromise which is always possible especially when injection are done in the forehead region  

For one day following injection of a filler in your forehead and below your left eye, you do have more swelling than usual. However, it's difficult to evaluate at one day. One problem is the small dark spot in the middle of the swollen area on your forehead. If your surgeon thinks the blood supply is compromised, you should start Nitrobid cream on that area twice a day, or even get hyperbaric oxygen therapy. This will have to be your plastic surgeon's call. Otherwise, ice soaks for the first two days is a usual treatment for swelling.I have my patients refrain from taking aspirin, Advil, Aleve, ibuprofin, fish oil, flax seed oil, green tea, garlic, vitamin E, and herbs for 3 weeks before injections or surgery to avoid such bleeding and bruising.I hope this has helped you somewhat.Thank you for your question, and good luck.