^^ I've heard that some girls have had blackheads from the Monistat Chafing Gel. But IMO I don't think they're removing all of their makeup/primer completely before going to sleep. Honestly, if you routinely remove all your makeup with a good makeup remover and exfoliate regularly, you shouldn't have a problem. I've been using this as a primer for at least 2-3 months, and I've not have a break-out or clogged pores. And I have super acne-prone skin! 
