Juvéderm is fairly hydrophilic (water loving) and can bind the water after it is injected. This accounts for some of the volumizing / "filling" effects seen with Juvéderm (and the other hyaluronic acid fillers as well). When Juvéderm is injected into the tear trough area, it can swell shortly after the treatment or in a much more delayed fashion (months later). This is a characteristic seen much more frequently with Juvéderm, but not its counterpart Restylane. For this reason, Restylane is more commonly used in the tear trough area because it does not exhibit as much swelling after injection. Hyaluronic acid fillers, such as Restylane and Juvéderm, can exhibit fairly long durations in the tear trough area. As a result, the swelling may persist as well. Your treatment was only a few days ago, so allow a bit more time for the swelling to resolve. If the swelling under your eyes does not resolve in a timely fashion, you may wish to consult with the person who did your injections. If you are unhappy with it, you may need to have a hyaluronidase (enzyme that breaks down hyaluronic acid) treatment to dissolve some of the Juvéderm product. As the product is broken down, the swelling will resolve. Regardless of whether the swelling resolves spontaneously, or requires treatment, the appearance of the tear trough and lower eyelids will be unchanged compared to what it was before you had the injections. Best wishes.