Facial Hair Removal Laser Hair Removal 1 — Questions and Answers
Question 1: What principle does laser hair removal rely on to destroy hair follicles?
- Cryotherapy
- Selective photothermolysis (Correct answer)
- Chemical dissolution
- Radiofrequency energy
Correct answer: Selective photothermolysis
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?
- Dark skin and dark hair
- Light skin and dark hair (Correct answer)
- Light skin and light hair
- Dark skin and light hair
Correct answer: Light skin and dark hair
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?
- Each session uses a different laser type
- Hair only responds to laser during the active (anagen) growth phase (Correct answer)
- The laser weakens with each use
- Insurance requires multiple visits
Correct answer: Hair only responds to laser during the active (anagen) growth phase
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?
- Alexandrite (755 nm)
- Nd:YAG (1064 nm) (Correct answer)
- Ruby (694 nm)
- Diode (810 nm) at high fluence
Correct answer: Nd:YAG (1064 nm)
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?
- Tan the skin to boost melanin
- Avoid sun exposure and tanning for at least 4–6 weeks prior (Correct answer)
- Apply self-tanner to darken the hair
- Bleach the facial hair for better contrast
Correct answer: Avoid sun exposure and tanning for at least 4–6 weeks prior
Sun exposure increases epidermal melanin, raising the risk of burns, hyperpigmentation, and reduced treatment efficacy.
Question 6: Which method of hair removal is contraindicated in the weeks before a laser hair removal session?
- Shaving
- Waxing or threading (Correct answer)
- Using depilatory cream
- Trimming
Correct answer: Waxing or threading
Waxing and threading remove the hair root that the laser needs to target, so they must be avoided before treatment.
Facial Hair Removal Laser Hair Removal 1
What principle does laser hair removal rely on to destroy hair follicles?