Blackheads are small bumps that appear on your skin due to clogged hair follicles. These bumps are called blackheads because the surface looks dark or black. Blackheads are a mild type of acne that usually form on the face, but they can also appear on several body parts.
Whiteheads are a form of acne. Acne breakouts commonly occur on the face, back, chest, and sometimes the neck and shoulders.
A pustule is a bulging patch of skin that’s full of a yellowish fluid called pus. It’s basically a big pimple.