Dark Hyperpigmented Spots Terminology
Dark hyperpigmented spots are most commonly called "hyperpigmentation," "hyperpigmented macules," or "hyperpigmented patches," with specific subtypes including melasma, solar lentigines (sun spots/age spots), post-inflammatory hyperpigmentation, and café-au-lait macules 1.
Common Clinical Terms
The medical terminology varies based on the specific characteristics and etiology:
General Terms
- Hyperpigmentation: The umbrella term for any darkened area of skin due to excess melanin production 1, 2
- Hyperpigmented macules: Flat, darkened spots
- Hyperpigmented patches: Larger areas of darkening (>1 cm)
Specific Named Conditions
Acquired hyperpigmented lesions include:
Melasma: Facial hyperpigmentation, typically symmetrical, more common in women and darker skin types (Fitzpatrick III-VI), triggered by UV exposure and hormonal factors 3
Solar lentigines: Also called "age spots" or "sun spots," these are well-demarcated brown macules from chronic sun exposure 1
Post-inflammatory hyperpigmentation (PIH): Dark spots that develop after skin inflammation, trauma, or dermatitis; particularly common in darker skin types and can persist for months after the inciting event 4, 1, 5
Café-au-lait macules: Light brown, well-demarcated patches present from birth or early childhood 1
Important clinical distinction: The term used depends on whether the pigmentation is epidermal (superficial) versus dermal (deeper), which can be determined by Wood's lamp examination 2. Epidermal hyperpigmentation appears more pronounced under Wood's light, while dermal pigmentation does not enhance 6.
Colloquial Terms
Patients commonly refer to these as "dark spots," "brown spots," "age spots," or "sun spots" 7.
Clinical Caveat
Critical warning: While most hyperpigmented spots are benign, always exclude melanoma and its precursors 1. Small dark dots within existing moles warrant biopsy, as 5% may represent melanoma arising within a nevus 8. Any irregular, asymmetric, or changing hyperpigmented lesion requires dermatologic evaluation to rule out malignancy 9, 10.