Blackheads form when hair follicles become clogged with excess oil, dead skin cells, and bacteria. The combination of these factors creates a plug in the follicle, which oxidizes and turns black when exposed to air. Hormonal changes, such as those that occur during puberty or menstruation, can increase oil production and make individuals more prone to developing blackheads.
Certain skincare products can also contribute to the formation of blackheads. Heavy moisturizers or makeup that is not non-comedogenic (meaning it does not clog pores) can trap oil and dead skin cells on the surface of the skin, leading to blackhead formation.
