Why Does Juvederm Leave a Bump After the Injections?

It’s not unusual for small bumps to occur following Juvederm
injections. These bumps occur at the
site of the injection and are related to the injection technique. When Juvederm is injected close to the
surface of the skin these bumps commonly occur. They can be prevented by avoiding superficial injections. Once they occur, they can be treated with
massage. In most cases, a response is
generated within a week following this maneuver. If
you’re concerned about this problem you should consult your physician. Your physician should be able to make an
appropriate recommendation.

I don't usually get any bumps with the injection. If placed too superficial, irregularities can occur. If the bump is not gone in a few days then I would question the injection technique.

This can be related to excess product which can be massaged out by your injector (don't do it yourself) or the injection technique. If it is the injection technique, it will resolve itself.