The types of acne are blackheads, whiteheads, pustules, papules, nodules, and cysts. A papule is a raised lesion that can fill with pus and become a pustule.

Acne can be troublesome, especially when you have a deep, painful pimple. These can often be caused by nodular or cystic acne which, unlike other forms of acne, such as whiteheads or blackheads ...