Skin Disease

作者：Kate Wiles · 年份：2026 · DOI：10.1201/9781003436201-15 · 研究领域：Acne and Rosacea Treatments and Effects、Dermatologic Treatments and Research、melanin and skin pigmentation

Hyperpigmentation is the most common skin change in pregnancy caused by increasing concentrations of oestrogen, progesterone, and melanocyte-stimulating hormone: Existing pigmented areas become darker, e.g., areolae, axillae. New pigmentation appears, e.g., linea nigra. Melasma describes irregular darkening of the central face in ~70% of pregnancies, typically the forehead, cheeks, upper lip, and chin.