Acne vulgaris is a common chronic skin disease involving blockage and/or inflammation of {pilosebaceous units}[hair follicles and their accompanying sebaceous gland]. Acne can present as noninflammatory lesions, inflammatory lesions, or a mixture of both, affecting mostly the face but also the back and chest.

Acne vulgaris is a common chronic skin disease involving blockage and/or inflammation of pilosebaceous units. Acne can present as noninflammatory lesions, inflammatory lesions, or a mixture of both, affecting mostly the face but also the back and chest.