I would not typically expect the use of soft tisse fillers, such as Juvederm, to promote or exacerbate acne. If you do have cystic acne, ask your physician about a medically based skin care program to help control and reduce outbreaks.
I am not aware of any link to increased acne.
If this is a concern for you, you may want to try a test area: have the doctor inject the filler in an out of the way place, like in the sideburn area. If you experience no problem, go for it.
These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.