Blackheads form due to the clogging of hair follicles by excess oil (sebum), dead skin cells, and bacteria. Several factors contribute to their development, including hormonal changes (such as those occurring during puberty, menstruation, or pregnancy), genetic predisposition, and certain medications that increase oil production.
Additionally, lifestyle factors such as diet, stress, and the use of comedogenic skincare products can exacerbate blackhead formation. Identifying these causes is essential for developing effective prevention and management strategies for blackheads.