what causes scalp acne
2. Folliculitis is one of the causes of scalp acne due to an infection of the hair follicles. Infection of the hair follicles can be caused by; fungus, bacteria or a viral infection. When hair follicles become clogged with overly productive sebaceous glands.
Other Causes. Scalp acne can be caused by a dirty scalp and hair. Using too much hairspray or other products to style the hair can clog scalp pores leading to acne. Not washing the hair often enough can also lead to clogged scalp pores.