What Is the Fitzpatrick Scale?
Developed by Harvard dermatologist Dr. Thomas Fitzpatrick in 1975, the Fitzpatrick Scale categorises human skin into six phototypes (I–VI) based on constitutive skin colour (genetic baseline pigmentation) and facultative skin colour (the tanning response to UV). It was originally designed to guide dermatologists in predicting UV sensitivity and sunburn risk.
The Six Phototypes
| Type | Appearance | Sun Reaction | Melanin Content |
|---|---|---|---|
| I | Very fair; freckles, red/blonde hair | Always burns, never tans | Very low |
| II | Fair; light eyes | Usually burns, sometimes tans minimally | Low |
| III | Medium; light brown hair | Sometimes burns, gradually tans | Moderate |
| IV | Olive; brown hair and eyes | Rarely burns, tans easily | Moderate-high |
| V | Brown skin; dark hair and eyes | Very rarely burns, tans easily | High |
| VI | Deep brown to black skin; dark hair/eyes | Almost never burns, tans deeply | Very high |
Clinical Relevance for Skincare
Your Fitzpatrick phototype determines several practical skincare considerations:
- SPF requirement: All phototypes benefit from daily broad-spectrum SPF. Types I–III face higher skin cancer risk; types IV–VI face greater photoageing-driven hyperpigmentation risk.
- Post-Inflammatory Hyperpigmentation (PIH): Phototypes IV–VI produce more melanin in response to inflammation, making PIH darker, more persistent, and more common after acne, waxing, or any inflammatory insult.
- Laser and peel treatments: Phototypes V and VI carry higher risk of post-procedure dyspigmentation — treatment parameters must be adjusted accordingly.
- HEV blue light risk: Higher melanin content in phototypes IV–VI means greater vulnerability to HEV-induced pigmentation (see the Digital Exposome guide).
The melanin paradox: Higher melanin content in types V–VI provides meaningful protection against UV-induced skin cancer (melanin absorbs UV and reduces DNA damage), but does not eliminate risk — skin cancer occurs in all phototypes, and types V–VI are often diagnosed later due to diagnostic underrepresentation.
For hyperpigmentation treatment stratified by phototype, see Hyperpigmentation. For the underlying pigment biology, visit Melanogenesis.