Acne keloidalis nuchae are a very rare type of acne that is caused by a scarring of the occipital scalp. The cause of acne keloidalis is unknown, but is thought to be related to genetics and hormones. Acne keloids can occur at any age, but are most common in young adults.
They can occur on any part of the body, but are most commonly found on the face, neck, and shoulders. Acne keloidalis is a bacterial infection can be treated with surgery or laser therapy, but there is no cure.