Facial Hair Removal Laser Hair Removal 1

Question 1

What principle does laser hair removal rely on to destroy hair follicles?

Accepted Answer

Selective photothermolysis

Answer

Selective photothermolysis uses a specific wavelength of light absorbed by melanin in the hair to selectively heat and destroy the follicle.

Question 2

Which skin and hair combination responds best to laser hair removal?

Accepted Answer

Light skin and dark hair

Answer

The contrast between light skin and dark hair allows the laser to target melanin in the hair without damaging surrounding skin.

Question 3

Why does laser hair removal require multiple sessions?

Accepted Answer

Hair only responds to laser during the active (anagen) growth phase

Answer

Laser energy destroys follicles most effectively during the anagen phase, and not all hairs are in this phase simultaneously.

Question 4

Which laser type is considered safest for darker Fitzpatrick skin types (IV–VI) for facial hair removal?

Accepted Answer

Nd:YAG (1064 nm)

Answer

The Nd:YAG laser's longer wavelength bypasses melanin in the epidermis, making it safer for clients with more melanin in the skin.

Question 5

What pre-treatment instruction is essential before facial laser hair removal?

Accepted Answer

Avoid sun exposure and tanning for at least 4–6 weeks prior

Answer

Sun exposure increases epidermal melanin, raising the risk of burns, hyperpigmentation, and reduced treatment efficacy.

Facial Hair Removal Practice Test