Laser hair removal for the underarm.
Tired of the constant cycle of shaving and irritation? Underarm laser hair removal offers a long term solution, and armpits are one of the most responsive areas for lasting results.
Why underarms are one of the best areas to treat.
Laser targets melanin, the pigment found in the hair, this absorbs the laser’s energy, converting it to heat to disable the follicle and prevent regrowth.
The underarms / armpits tend to have darker, coarser hair, making them one of the most responsive areas for laser treatment. The greater the contrast between hair and skin tone, the more effectively the laser works.
Is underarm laser hair removal safe?
Yes. When used correctly, underarm laser hair removal is a safe and clinically proven method of permanent hair reduction.
Professional clinics worldwide trust the 810nm diode laser wavelength for safe, effective hair removal. The Tria 4X uses this same technology and is the only at-home laser device to be FDA-cleared for permanent hair reduction.*
For added peace of mind, the built-in skin tone sensor reads your skin before every treatment, only activating when it is safe to do so.
For a full breakdown of laser hair removal safety, read our complete breakdown below.
What causes dark underarms?
Dark underarms, sometimes referred to as underarm pigmentation, can be caused by a number of factors. Common causes include frequent shaving, deodorant use and ingrown hairs; all of which can lead to irritation and skin darkening over time.
Reducing hair regrowth with laser may help minimise some of these triggers, particularly those caused by frequent shaving and ingrown hairs.
How much does underarm laser hair removal cost?
Professional underarm laser hair removal adds up quickly. With multiple sessions needed, the costs can be significant.**
The Tria 4X is a one-off investment usable across multiple treatment areas, making it a far more cost effective option in the long run.
| Tria 4X Hair Removal Laser | Professional Laser | |
|---|---|---|
| Cost per session |
One-off investment |
$200 to $900** |
| Sessions needed |
Up to 8 treatments |
6-8 minimum |
| Average total cost |
$599 |
~$4,200** |
| Hair reduction |
See up to 100%*** |
See up to 100% |
| Travel and appointments |
Not needed |
Required |
How to treat your underarms with the Tria 4X.
Cleanse and shave the area and apply Phytograph Hydrating Calm Soothing Gel before treatment.
Unlock the device using the skin tone sensor in the base, select your treatment level and treat by placing the tip of the device against your skin.
Lift and repeat, with a small amount of overlap.
Apply the gel again after your treatment to soothe and hydrate your skin.
Real results.
2 weeks of growth, before and after 8 treatments.
1 week of growth, before and after 4 treatments.
3 days of growth, before and after 4 treatments.
Begin your underarm laser hair removal journey.
Clinically proven, FDA-cleared and designed for real, lasting results.
See up to 100% hair reduction in as few as 8 treatments*** and explore the Tria 4X today.
Shop hair removal.
*Permanent results are defined as a permanent reduction in hair regrowth following a full course of laser treatments. Based on independent clinical trial results, details available on our website.
**Based on average USA clinic costs for full body laser hair removal. Calculated and accurate as of August 2025.
***Based on user self assessment scores during an independent clinical trial of 21 participants.