But there's also nodular acne, cystic acne, hormonal acne, and fungal acne. Who knew? It's a lot, but we'll walk you through all the different types, why they happen, and how to treat them.

Struggling with stubborn acne? This guide breaks down six types—whiteheads, blackheads, papules, pustules, nodules, and cysts—and shares expert tips to treat each one. From skincare must-haves ...