Days or weeks?
When skillfully done, Juvederm injections result in very little swelling most of the time. However, it does vary from person to person, and areas such as the lips will stay swollen for a day or two. Avoiding antiocoagulants such as ibuprofen or aspirin for several days prior will minimize bruising.
The majority of patients look great the next morning with a little makeup to cover any little red dots that they might have, and most don't have any by then. Bruising is always a risk, and sometimes it is more difficult to hide the bruise with your general makeup, and you might need to use a concealer underneath your makeup.