Done With the Daily Shave? Here’s What BBL HERO Can Do for Your Underarms

Let’s be honest — underarm hair removal is one of those things nobody talks about, but almost everyone is thinking about. The daily shave, the stubble that appears 24 hours later, the irritation, the ingrown hairs, the awkward regrowth between waxing appointments. It’s a lot of maintenance for something that should be completely on autopilot.

If you’ve been curious about laser hair removal but weren’t sure what to expect — or whether it actually works — this one’s for you. At Hi, Finch, we use BBL HERO (High Energy Rapid Output) for hair reduction, and it’s genuinely one of the most satisfying treatments we offer. Patients walk out of the underarm appointment in under 15 minutes and wonder why they waited so long.

Here’s the full breakdown.

What Is BBL HERO and How Does It Work for Hair Removal?

BBL HERO stands for BroadBand Light High Energy Rapid Output. It’s a next-generation broadband light platform made by Sciton — one of the most respected names in medical-grade laser technology — and it’s a significant upgrade from older IPL (intense pulsed light) devices.

For hair removal specifically, BBL HERO works by delivering precise pulses of light energy into the skin. That light is absorbed by melanin — the pigment in your hair follicles. The absorbed energy converts to heat, which damages the follicle enough to disrupt its ability to grow new hair. Over a series of treatments, follicles that have been repeatedly targeted stop producing hair altogether.

What makes HERO different from older broadband light systems is the speed and energy output. It can treat larger areas faster without sacrificing effectiveness — meaning your underarm appointment is quick, comfortable, and efficient. Less time in the chair, better results.

Why Underarms Are One of the Best Areas to Start With

If you’re new to laser hair removal, underarms are genuinely one of the ideal places to begin — and here’s why.

The hair is coarse and dark. BBL HERO works by targeting melanin. Coarser, darker hair contains more melanin, which means it absorbs light energy more efficiently. Underarm hair tends to be a great candidate.

The area is small. Each underarm takes just a few minutes to treat. You’re looking at a 10–15 minute appointment total, which makes it easy to fit into a lunch break.

The contrast is noticeable quickly. Because you’re used to shaving daily (or close to it), you’ll notice within your first few weeks of treatment that regrowth is coming in slower, thinner, and patchier. That progressive change is motivating.

The skin is sensitive. This is actually a point in laser’s favor. Repeated shaving and waxing causes chronic irritation, ingrown hairs, post-inflammatory darkening, and folliculitis in the underarm area. Reducing hair growth also reduces the ongoing trauma to that skin — so many patients notice the underarm skin itself looks and feels better over time.

What to Expect During a BBL HERO Underarm Treatment at Hi, Finch

Nashville patients are often surprised by how straightforward the process is. Here’s the typical flow:

Before your appointment: You’ll shave the underarm area 24 hours before your treatment — not the morning of, and definitely not same-day. (No waxing or threading before — the follicle needs to be intact for the light energy to reach it.) Avoid active retinoids or exfoliants in the area for a few days prior, and come in with clean, product-free skin. For two weeks before your appointment, avoid direct sun exposure and any self-tanner on the underarm area — sun exposure and tanning products increase melanin in the skin, which can interfere with how the light energy is absorbed and raise the risk of irritation.

During treatment: Your provider will apply a cooling gel and use the BBL HERO handpiece to deliver rapid pulses of light to the underarm. You’ll feel warmth and a quick snapping sensation with each pulse — most patients describe it as tolerable, especially compared to waxing. The HERO platform moves quickly, so the discomfort is brief.

After your appointment: The area may look slightly pink and feel like a mild sunburn for a few hours. This is normal and resolves quickly. You can return to regular activities immediately — there’s no real downtime. Avoid heat (saunas, hot showers, intense workouts) for 24 hours and keep the area out of direct sun.

How Many Sessions Do You Actually Need?

This is the question everyone asks, and the honest answer is: it depends on your hair growth cycle, your hair color, and your individual response to treatment — but most patients need 8 sessions spaced 4–6 weeks apart to achieve significant, lasting reduction.

Here’s why multiple sessions are required: hair grows in cycles. At any given moment, only a portion of your hair follicles are in the active growth phase (called anagen). BBL HERO is most effective on follicles in the anagen phase, which is why spacing your sessions out catches different follicles at their most treatable point.

After completing a full treatment series, many patients experience 80–90% permanent reduction in underarm hair. Some maintenance sessions once or twice a year may be helpful for any remaining sparse regrowth, but for most people, the daily shave becomes a non-issue.

Who Is a Good Candidate for BBL HERO Hair Removal?

BBL HERO works best on patients with lighter skin tones and darker hair — the higher the contrast between hair pigment and skin pigment, the more efficiently the light energy targets the follicle. That said, the technology has advanced significantly, and our providers at Hi, Finch will assess your skin type and hair color during your consultation to determine whether BBL HERO is the right fit for you and adjust settings accordingly.

Ideal candidates:

• Fair to medium skin tones with dark underarm hair
• Patients frustrated with daily shaving or frequent waxing
• Anyone dealing with underarm ingrown hairs or folliculitis from shaving
• Patients who want a low-maintenance, long-term solution

Patients who may not be candidates:

• Very light or blonde underarm hair (low melanin content makes targeting harder)
• Active tan or very dark skin tones (requires individualized assessment)
• Those who are pregnant or nursing
• Patients on certain photosensitizing medications

Not sure if you qualify? That’s exactly what a consultation is for. We’ll look at your skin, your hair, and your history to build the right plan.

Frequently Asked Questions About BBL HERO Underarm Hair Removal

Does BBL HERO hair removal hurt?

Most patients describe it as a quick snapping or warmth sensation with each pulse — uncomfortable for a moment, but not painful in a way that requires numbing cream for most underarm treatments. The HERO platform moves fast, so each area is treated quickly. Compared to waxing, many patients find it significantly more tolerable.

How long until I see results?

You may notice some shedding of treated hairs within 1–2 weeks of your first session. Meaningful reduction in regrowth typically becomes noticeable after your second or third treatment. By the time you complete all 8 sessions, the change is dramatic for most patients.

Can BBL HERO help with underarm darkening?

Yes — and this is an underrated benefit. Chronic shaving and friction can cause post-inflammatory hyperpigmentation in the underarm area. Once hair removal reduces the need for shaving, that repetitive irritation stops. Some patients also notice that the BBL light energy itself has a mild brightening effect on the skin over the course of treatment. 

Is there anything I need to avoid before my session?

Shave 24 hours before your appointment — not same-day. Come in with clean, dry skin — no deodorant, lotion, or products on the underarm. For two weeks prior, avoid direct sun exposure and self-tanner on the underarm area, as both can affect how your skin responds to treatment. Let your provider know if you’ve recently used any medications or topicals that increase photosensitivity.

How is BBL HERO different from a regular IPL device?

Great question. Older IPL devices deliver light at lower energy levels and slower speeds. BBL HERO’s high-output, rapid-delivery technology means more effective treatment in less time — and because it’s a medical-grade platform calibrated by a trained provider, it’s safer and more precise than consumer-grade or med-spa-lite options.

Ready to stop thinking about your underarms entirely? That’s the goal. Book a BBL HERO consultation at hifinch.com and we’ll walk you through what to expect, confirm you’re a good candidate, and build a treatment plan that actually works. Nashville patients — we’re right here when you’re ready.

References

Gan SD, Graber EM. Laser hair removal: a review. Dermatol Surg. 2013;39(6):823–838. doi:  10.1111/dsu.12116

Lim SP, Lanigan SW. A review of the adverse effects of laser hair removal. Lasers Med Sci. 2006;21(3):121–125. doi:10.1007/s10103-006-0385-x