Milia are small white bumps formed when keratin and dead skin cells get trapped under the skin. Primary milia appear without a cause, while secondary milia occur after skin injuries. Milia are ...

On the long list of skin things that look like acne but actually aren't: fungal acne (it's actually folliculitis), butt acne (also, probably, folliculitis), and, of course, milia. To the untrained eye ...