Fillers and Acne, is this normal?

I have filler (restylane) in a specific area in my forehead where I had a deep scar. Occasionally if I get a pimple in this area, it seems that the pimple is 4 times the size it ever was. Is this normal? Its almost as if the pimple grows on top of the filler and makes it so much bigger & bulkier! I'm talking like, can't leave house huge! Is this a thing? Can getting ance or cysts on areas that have filler in it make them appear larger?