Types of Lasers Used for Hair Removal

Laser hair removal is a quick, noninvasive treatment that has been growing in popularity because of its promise of permanent hair removal. The industry, which is regulated by the FDA, continuously improves the technologies used for the procedure.

Significance

Not all hair removal lasers or techniques are the same. Practitioners choose what equipment to use based on hair color, skin color and preexisting skin conditions.

Function

Heat from the laser targets dark pigments in hair. This heat burns the hair, destroying the follicle and, over time, leading to permanent hair removal.

Types

Different laser types use different light wavelengths to generate heat. The most commonly used lasers include Ruby (694-nm), Alexandrite (755-nm), Diode (800-nm) and Q-Switched Nd:YAG (1064-nm).

Considerations

Practitioners use lasers with smaller wavelengths for lighter skin and progressively larger wavelengths for darker skin. Since the lasers target dark pigments, certain shorter wavelengths can damage darker skin.

Misconceptions

Not all patients experience permanent hair removal after laser treatments. The chances of having permanent results are highest for light-skinned, dark-haired patients with multiple treatments and maintenance.

Warning

According to the FDA, lasers should be used only under the direction of a licensed practitioner. Even when done properly, patients may experience skin discoloration, scabs, acne and swelling.

References

• FDAL Laser Facts
• Dermatological surgery; A practical review of laser-assisted hair removal using the Q-switched Nd:YAG, long-pulsed ruby, and long-pulsed alexandrite lasers; Nanni CA, Alster TS; Dec. 1998
• Journal of cosmetic and laser therapy; Hair reduction: 48 months of experience with 800nm diode laser; Kopera D; Dec. 2003

Resources

• American Society for Dermatologic Surgery: Laser Hair Removal