Medically reviewed by Susan Bard, MD Key Takeaways Butt acne is usually caused by other skin conditions like folliculitis or keratosis pilaris.  Benzoyl peroxide washes and exfoliating creams can help ...

Medically reviewed by William Truswell, MD Nodular acne is a painful, severe form of inflammatory acne that forms hard lumps under your skin.Over-the-counter treatments do not work for nodular acne, ...