Whiteheads are a type of acne that forms when dead skin cells, oil (sebum), and bacteria clog hair follicles. They appear as small, white or flesh-colored bumps on the skin, typically on the face, chest, or back. Unlike blackheads, which have open pores, whiteheads remain closed, trapping the contents inside.

Factors like hormonal changes, excess oil production, and poor skincare habits can contribute to their formation. Proper cleansing, exfoliation, and the use of non-comedogenic products can help prevent and manage whiteheads, while treatments like salicylic acid or benzoyl peroxide can aid in clearing them.