Acne Acne is one of the most common skin concerns. It can affect teens and adults, and it may appear on the face, chest, back, shoulders, neck, or jawline. While acne is often mild, it can become painful, persistent, inflamed, or emotionally distressing. Acne is not simply a hygiene problem. It can be related to oil production, clogged pores, bacteria, inflammation, hormones, medications, skin products, stress, and other factors. The right treatment depends on the type of acn