I had to look up what a blind pimple is lol. So it's a cystic pimple that doesn't form a head, right?
When I had them nothing worked to prevent them, only a certain kind of birth control pill that is higher in estrogen than others and therefore specifically prescribed for acne. To treat them, a prescription antibiotic gel worked somewhat by shortening it's lifespan
Every single one of them left a stubborn dark mark behind, so if I ever get them again I will freak out cause the marks were so hard to get rid!!!