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Nipple and Areola Color Variation: Genetic, Hormonal, and Vascular Factors
Determinants
- Genetics: Melanin production baseline varies by ancestry; darker skin tones correlate with darker areolae.
- Hormones: Estrogen/progesterone surge in pregnancy → melanocyte stimulation → darkening (often permanent).
- Vascularity: Arousal or lactation → engorgement → pink/red hue.
Wide variation is normal. Sudden unilateral change, ulceration, or discharge warrants evaluation for Paget's disease or malignancy.
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