The six types
| Type | Sun response | Typical description |
|---|---|---|
| I | Always burns, never tans | Very fair skin, often with red or blonde hair and freckles. |
| II | Usually burns, tans minimally | Fair skin, light hair, blue/green eyes common. |
| III | Sometimes burns, tans gradually | Medium skin, darker hair, brown eyes common. |
| IV | Rarely burns, tans easily | Olive or light brown skin, dark hair and eyes. |
| V | Very rarely burns, tans deeply | Brown skin, dark hair and eyes. |
| VI | Never burns, deeply pigmented | Deep brown to black skin. |
Why it matters for laser hair removal
Laser hair removal works by targeting melanin. The pigment inside the hair shaft absorbs the laser and converts it to heat. The problem: your skin also contains melanin. The higher your Fitzpatrick type, the more surface melanin the laser will pass through on its way to the follicle.
Shorter wavelengths are strongly absorbed by any melanin they encounter — great for follicle destruction on lighter skin, dangerous on darker skin because they heat the surface. Longer wavelengths penetrate deeper and are less absorbed by surface melanin — which is why they can safely reach the follicle on Type IV–VI skin without heating the top layer.
Wavelength by skin type
| Fitzpatrick | Preferred wavelength | Why |
|---|---|---|
| I–III | Alexandrite 755nm | Highly absorbed by melanin. Efficient follicle destruction with minimal surface risk on lighter skin. |
| IV | Alexandrite or Nd:YAG | Depends on hair coarseness and any recent sun exposure. |
| V–VI | Nd:YAG 1064nm | Longer wavelength bypasses surface melanin, protecting the epidermis. |
What this means for choosing a clinic
Common myths
"Laser doesn't work on dark skin." False on modern devices. Nd:YAG safely and effectively treats Fitzpatrick V–VI. This myth persists because older devices really couldn't — and clinics without modern equipment still refuse to treat these patients.
"Fitzpatrick just means skin color." False. It classifies how your skin responds. Two people with identical visible color can have different Fitzpatrick types depending on their sun response.
For overall safety context, read Is Laser Hair Removal Safe?
Key takeaways
- · Fitzpatrick classifies skin by its response to sun exposure, not just visible color.
- · Types I–III are typically treated with Alexandrite (755nm).
- · Types IV–VI require Nd:YAG (1064nm) to bypass surface melanin safely.
- · Wrong wavelength for skin type is the leading cause of pigment complications.
- · Skin typing should be done in person at consultation — not self-assessed.