Acne is the most common skin condition in the United States affecting men and women of all ages. Acne can appear on the face, back, chest, shoulders and neck. Acne can cause significant scars if left untreated.
Acne is split into two categories non-inflammatory lesions and inflammatory lesions. Non-inflammatory lesions include comedones, which are created when the openings of hair follicles become blocked or clogged with oil secretions, dead skin cells, or bacteria. Inflammatory lesions include papules, pustules (pimples), nodules, and cysts.
Papules are small raised bumps that may be red and tender. They signal inflammation or infection in the hair follicles. Pustules are red, tender bumps with white pus at their tips. Nodules are large, solid, painful lumps beneath the surface of the skin. They develop by secretion deposit build up deep within the hair follicles. Cysts are painful, pus-filled lumps beneath the surface of the skin.