|Acne ay be attributed to genetics or hormonal imbalance. Contributing factors, or acne triggers, include lifestyle choices, such as diet, sleep pattern, hygiene, or stress. When skin does not exfoliate as it should, dead cells build up on the skin surface and inside the pore. Dead cells mix with trapped oil and then pores become clogged, resulting in blackheads and whiteheads. Some forms of acne require medical treatment, oral medication or procedures.