Under eye fillers are about as safe as all other fillers, meaning they are considered to be a minimally-invasive cosmetic procedure that is not without risks, but these risks are rare. Since the under eye area is more sensitive and contains a higher quantity of blood vessels, the chances of slight bruising and swelling are increased. As with all injectable treatments, and especially dermal fillers, finding an experienced, high-quality injection specialist will be worth the extra money as you will be able to achieve much better results with far fewer risks. Especially for such a sensitive area, this procedure should only be performed by a cosmetic surgeon or board-certified dermatologist. Any skilled and qualified dermal filler provider will ensure that all of their patients are aware of all possible risks and side effects and that the proper precautions are in place to make the procedure as low-risk as possible.