Dermal fillers are considered to be quite safe, with many of them having been FDA-approved for use to solve various cosmetic concerns. However, like any type of procedure that involves having substances injected into the body, care should be taken. First and foremost is finding a trained and certified practitioner to perform the injection. This person should be knowledgeable about the types of fillers, be able to provide before and after pictures of patients, understand and explain the risks and benefits and provide you with any details about what would happen in the case of an emergency during your procedure. While the chances of this happening are very rare, there is a risk of adverse side effects or an allergic reaction any time a substance is injected into the body.