Reducing Hair Growth with Laser Treatment
Medically reviewed by Dr. Yousef Binamer — Consultant
Laser treatment can reduce hair growth over the longer term. Results depend on the hair, skin and treatment area. A course of sessions is usually needed, and maintenance treatment may be required later.
How treatment works
Pigment in the hair absorbs light energy, which becomes heat and affects the follicle. Hairs are not all in the same growth phase, so sessions are repeated to treat hairs entering a growth phase at different times. Treatment intervals depend on the body area and response rather than a single universal timetable. [1]
Hair colour and skin tone
Dark hair generally responds better than white, grey or very light hair to conventional laser treatment. Darker skin can be treated with appropriate technology and settings by a practitioner experienced with that skin tone, while accounting for burns and pigment changes. Sudden excess hair or hair growth with irregular periods may need assessment for an underlying cause. [2, 1]
Preparing for a session
Avoid tanning and report recent sun exposure, medications and previous scarring. Avoid removing hair from the roots by waxing or plucking for the interval specified by the practitioner, and follow shaving instructions. Do not apply topical anaesthetic over a large area or under a covering without medical direction. [2]
During and after treatment
Appropriate eye protection is used, and brief stinging or heat may be felt. Temporary redness or mild swelling around follicles can occur. Follow instructions on cooling, cleansing, gentle care and sun protection. Severe pain, large blisters or increasing irritation should be reported to the treating team. [1]
Limits and pregnancy considerations
Some regrowth is possible, and facial or hormonally influenced hair may require longer follow-up. Risks include pigment changes, burns and scarring, and rarely increased hair growth in some areas. If pregnant or possibly pregnant, tell the practitioner and discuss postponing elective sessions rather than assuming they are automatically suitable. [1, 3]
Key point
A realistic goal is reduced hair growth and density. Matching the device and settings to the skin matters more than promises of complete permanent removal.
References
- American Academy of Dermatology | Laser hair removal FAQs
- American Academy of Dermatology | Laser hair removal preparation
- North Bristol NHS Trust | Laser treatment questions
References are clickable. Accessed 2026-09-05.
Frequently asked questions
How does laser treatment affect hair?
Pigment in the hair absorbs light energy, which becomes heat and affects the follicle. Hairs are not all in the same growth phase, so sessions are repeated to treat hairs entering a growth phase at different times.
Does white or light hair respond to laser?
Dark hair generally responds better than white, grey or very light hair to conventional laser treatment.
Can darker skin be treated with laser?
Darker skin can be treated with appropriate technology and settings by a practitioner experienced with that skin tone, while accounting for burns and pigment changes.
Can hair grow back after laser sessions?
Some regrowth is possible, and facial or hormonally influenced hair may require longer follow-up. A realistic goal is reduced hair growth and density.
Can laser sessions be done during pregnancy?
If pregnant or possibly pregnant, tell the practitioner and discuss postponing elective sessions rather than assuming they are automatically suitable.