How Do You Know if You Were Injected into an Artery with Radiesse?

Hi Mia.  Regardless of which product is being injected, it's possible to hit a blood vessel.  One of the techniques that help avoid this is to inject the product as the needle is being moved backward and outward toward the surface of the skin.  By injecting only as the needle is being pulled out, it dramatically reduces the chance of injecting into a blood vessel.

A good and experienced injector will be able to recognize immediately when this has happened and use massaging and warm packs to release the product from the vessel.

Thank you for your question. It is difficult to give you advice without examining you in person. However, if necessary you can have the filler dissolved with hyaluronidase. I recommend having a follow up with your injector for an evaluation. Best of Luck!