Cystic acne results from the same process that causes all acne—the clogging of pores with excess oil and dead skin cells—but ...

Cystic acne occurs very deep under the skin's surface ... It could also increase your risk of infection. Causes of skin tags: “They often occur in areas of friction, like by the neck, underarms ...

Similar to the bumps that can form on your face, back, or chest—scalp acne is something that can happen to anyone, anytime.