The short answer
Underarms are a small area with usually dark, coarse hair, making them quick to treat and one of the most effective and affordable zones for laser. A session takes only minutes, and a typical course is six to eight sessions spaced four to eight weeks apart. The skin is sensitive, and deodorant should be skipped on treatment days. As elsewhere, expect long-term reduction rather than guaranteed permanent removal.
Underarms are a favourite starting point for laser hair removal: small, fast, affordable, and the hair is usually exactly the type laser handles best. If you are testing the waters before committing to larger areas, the underarms are a sensible place to begin. Here is what to expect.
Underarm laser at a glance
- Area Small — quick session
- Hair type Usually dark, coarse — responds well
- Per-session cost Roughly £50–£150
- Course 6–8 sessions typical
- Spacing 4–8 weeks apart
- On the day Skip deodorant; shave beforehand
Why underarms respond well
The underarms tick the boxes laser likes: the hair is usually dark and coarse, and the area is small and well defined. Because laser works by heating the melanin pigment in the follicle, dark hair against suitable skin tends to respond strongly here. The small size means each session takes only a few minutes, and per-session prices sit at the lower end of the typical range — roughly £50 to £150, depending on the clinic, and often less when bought as part of a package. That combination of speed, low cost and effectiveness is why underarms are such a common first area for people new to laser.
The underarms are also a region where shaving causes frequent irritation, ingrown hairs and darkening of the skin from constant razor use, so reducing the hair can improve both comfort and appearance over time. A patch test confirms how your skin and hair respond before the first full session. If your underarm hair happens to be fair, grey or very fine, it may respond less well — see blonde and grey hair — but for most people underarm hair is dark enough to be a good candidate.
What a course looks like
Expect a typical course of six to eight sessions, spaced four to eight weeks apart. As with all areas, the spacing exists because the laser only affects follicles in their active growth phase, so sessions are timed to catch successive waves of hair as different follicles cycle into growth. Density usually drops noticeably after the first few sessions, and because the area is small you can often slot appointments into a lunch break. Keeping to the recommended spacing matters more than rushing: too soon and you treat dormant follicles, too late and growth re-establishes between visits.
| Aspect | Underarm specifics |
|---|---|
| Session length | A few minutes — very quick |
| Cost | Low — small-area pricing |
| Course | 6–8 sessions, 4–8 weeks apart |
| Result | Long-term reduction; finer regrowth |
On the day and aftercare
- Shave the area beforehand (do not wax or pluck) as advised by your clinic.
- Do not apply deodorant or antiperspirant on treatment day — the practitioner will ask you to skip it.
- Avoid sun and self-tan on the area — see sun exposure.
- Expect short-lived redness or small bumps; follow aftercare and avoid friction from tight clothing immediately afterwards.
- Disclose any medication at consultation, as some increase the skin’s sensitivity to light.
- Have a patch test before your first session so the practitioner can set safe, effective levels for your skin.
Is it worth starting here?
For many people the underarms are the ideal first area: low cost, quick sessions and a good chance of a clear, visible result, which builds confidence before tackling larger zones like the legs or bikini. Because the area is small and the hair usually responds well, it is a low-risk way to find out how your skin tolerates treatment and whether laser suits you before spending more on larger areas. Set expectations with what results to expect — this is long-term reduction, not guaranteed permanent removal, and occasional maintenance sessions are normal once the main course is finished.
This page is general information, not medical advice. A qualified practitioner should assess your skin and hair at a consultation and patch test before any course, and individual results vary from person to person. Even on a responsive area like the underarms, the goal remains long-term reduction rather than a promise that no hair will ever return.
Start with a quick, affordable area
Underarms are an easy first step into laser. Find a clinic offering a consultation and patch test so you know what to expect.
Frequently asked questions
How long does an underarm session take?
Only a few minutes — the underarms are a small area, which is part of why they are quick, affordable and a common first treatment.
How much do underarms cost?
They sit at the lower end of the range, roughly £50 to £150 per session depending on the clinic, and are often included in package deals.
Why can't I wear deodorant on the day?
Deodorant and antiperspirant can interfere with treatment and irritate freshly treated skin, so the practitioner will ask you to skip it on the day.
Will my underarm hair be gone for good?
Expect a marked long-term reduction with finer regrowth rather than guaranteed permanent removal, plus occasional maintenance to keep results.
Sources & further reading
- NHS — Cosmetic procedures: laser hair removal and IPL
- MHRA — Lasers and IPL: cosmetic use safety guidance
- Healthcare Improvement Scotland — Regulation of independent clinics
- JCCP — Practitioner standards for laser and IPL
This guide is general information, not medical advice. A patch test and consultation with a qualified, regulated practitioner are essential before treatment, and results vary by individual. Laser achieves long-term hair reduction, not guaranteed permanent removal of every hair. Discuss any skin or health concerns with the practitioner or your GP.