Blind pimples, aka cystic acne, are painful zits that exist under the skin and never come to a head. To treat blind pimples, try benzoyl peroxide, a cold compress, and avoid attempting to pop it.

Cystic-acne sufferers know that a cyst is not the same beast as your garden-variety pimple. While whitehead pimples sit on the surface of the skin (which, though unsightly, means they’re easier ...