hyperpigmentation

/ˌhaɪpərˌpɪɡmənˈteɪʃən/
noun
  1. The darkening of an area of skin caused by an increase in melanin.
    • Hyperpigmentation is common in people with darker skin tones.
    • Sun exposure can cause hyperpigmentation, resulting in dark spots on the face and hands.
    • She used a special cream to reduce the hyperpigmentation left by acne scars.
Synonyms