Yes, it probably does have something to do with the massaging. You either developed a deep hematoma or massaged the Juvederm into an area where it was not injected. Please return to your physician yo find out what can be done to help the situation.
Massage should only be done by the cosmetic injector. By massaging it yourself you could have shifted the product which could have formed the lump. It could also be swelling. Since you did manipulate the product afterwards i would return to your injector for assessment. Hope that helps
I absolutely ask people to keep their hands away from injection sites and not to massage anything. So many people do not know proper technique and end up pressing the Juvederm into unwanted areas and/or creating scar tissue and lumps. It is just a bad idea. So stop massaging. Keep your hands off of the area. It's been a day and you have swelling (some of which you created) and water retention from the product itself. Leave the area alone and let things settle down. It can take up to 2 weeks for all swelling to resolve. At that point if you still have a bump, see your injector for an assessment.
"This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."