miraDry: Permanent Sweat Reduction — Full Review

What Is miraDry?

miraDry is an FDA-cleared, non-invasive procedure that uses electromagnetic energy (specifically, microwave thermolysis) to permanently destroy sweat glands in the underarms. Unlike treatments such as Botox or clinical antiperspirants that temporarily reduce sweating, miraDry eliminates the sweat glands themselves — and because sweat glands don't regenerate, the results are permanent.

If you're exhausted from the endless cycle of reapplying antiperspirant, changing shirts, and avoiding raising your arms, miraDry offers something genuinely different: a lasting solution. Published series report a marked reduction in underarm sweating after the standard two-treatment protocol, with the majority of patients reporting dramatic improvements in quality of life.

Originally cleared by the FDA in 2011 for the treatment of axillary hyperhidrosis, miraDry has since been performed over 250,000 times worldwide. It's also FDA-cleared for the reduction of underarm hair and the treatment of axillary bromhidrosis (body odour), offering a three-in-one benefit that makes it unique among hyperhidrosis treatments.

How miraDry Works: The Science of Microwave Thermolysis

The Technology

miraDry uses precisely controlled electromagnetic energy at a frequency of 5.8 GHz — the same microwave frequency used in WiFi routers, but focused and amplified for therapeutic purposes. Here's the step-by-step process:

1. Energy delivery: The miraDry handpiece is placed against the underarm skin. It emits focused microwave energy that penetrates to the depth where sweat glands reside (the dermal-hypodermal interface, approximately 2-5 mm below the skin surface).

2. Selective heating: The electromagnetic energy creates a focal zone of therapeutic heat at the level of the sweat glands. Both eccrine (sweat) and apocrine (odour) glands in this zone are heated to the point of cellular destruction (thermolysis).

3. Simultaneous cooling: While the deep tissue is being heated, the miraDry system simultaneously cools the skin's surface using a hydro-ceramic cooling system. This protects the epidermis and superficial dermis from thermal damage while allowing the energy to destroy the glands underneath.

4. Permanent destruction: The targeted sweat glands undergo thermal necrosis and are subsequently absorbed by the body through normal biological processes. Because humans are born with a fixed number of sweat glands that don't regenerate, the destroyed glands are gone permanently.

Why Only Underarms?

A common question — and a legitimate limitation. miraDry is currently available only for underarm treatment. There are several reasons:

• Anatomy: The underarm has the right tissue characteristics (gland depth, skin thickness) for optimal energy delivery and cooling.
• Safety: Hands and feet have complex nerve and tendon structures just millimeters from the sweat glands. The risk of collateral damage is too high with current technology.
• FDA clearance: The device has been studied and cleared specifically for axillary use.

For excessive sweating on hands and feet, consider iontophoresis or Botox. For a comprehensive overview of all treatment options, see our complete guide to hyperhidrosis.

The miraDry Procedure: What to Expect

Before Your Appointment

Consultation: Your first appointment will typically be a consultation where the provider assesses your underarm sweating, discusses your goals, and determines if you're a good candidate. Some providers perform the treatment at the first visit if you're clearly appropriate.

Preparation:

• Shave your underarms 3-4 days before the procedure (not the day of — slight regrowth helps the provider see the treatment area)
• Avoid antiperspirant or deodorant on the day of treatment
• Wear a comfortable, loose-fitting top with sleeves (not a tank top — you'll want soft fabric over the treated area afterward)
• Plan for the appointment to take 1-1.5 hours

During the Procedure

1. Marking: The provider applies a temporary tattoo template to your underarm to guide treatment. This ensures complete, even coverage of the sweat-producing area.

2. Numbing: Local anesthesia (lidocaine) is injected into each underarm using a series of small injections. This is the most uncomfortable part of the procedure — once the numbing takes effect, the rest is painless. Most providers use a tumescent anesthesia technique that provides thorough numbness and creates a fluid layer that helps protect underlying structures.

3. Treatment: The miraDry handpiece is placed on the treatment area following the template grid. Each activation takes a few seconds, with a brief sensation of suction as the device positions the tissue optimally. The provider works systematically across the entire treatment area. Treatment of both underarms takes approximately 60-90 minutes.

4. Immediate aftercare: Ice packs are applied to the treated areas. You can go home immediately.

What It Feels Like

During the numbing phase, you'll feel a series of small pinch-like stings (similar to dental anesthesia). Once numb, the treatment itself causes only a sensation of pressure and suction — no pain. Some patients feel warmth, but it shouldn't be uncomfortable.

Recovery and Downtime

miraDry recovery is straightforward but does involve several days of discomfort:

Day 1-3:

• Significant swelling in the underarm area (this is normal and expected)
• Soreness and tenderness — feels like a bruise
• Mild numbness in the treated skin
• Ice packs recommended 15-20 minutes on, 15-20 minutes off
• Over-the-counter pain relief (ibuprofen) is usually sufficient
• Most people take 1-2 days off work (not strictly required, but recommended)

Day 4-7:

• Swelling begins to subside
• Soreness decreases significantly
• Small bumps or nodules may be palpable under the skin (these resolve)
• Can resume light exercise

Week 2-4:

• Most swelling resolved
• Occasional tingling or altered sensation in the underarm skin (temporary)
• Can resume all normal activities including vigorous exercise

Months 1-3:

• Full healing complete
• Any residual numbness or tingling typically resolves
• Final results apparent

The Two-Treatment Protocol

Why Two Treatments?

The standard miraDry protocol involves two treatments spaced approximately 3 months apart. The reasons for this approach:

1. Not all glands are destroyed in one session. miraDry targets glands at a specific depth range. Some glands sit slightly outside this zone during the first treatment.
2. Tissue changes after the first treatment can bring previously deeper glands into the effective range for the second session.
3. Clinical data shows significantly better outcomes with two treatments compared to one. Reported outcomes are better after two treatments than one.

Results After Each Treatment

Is a Third Treatment Ever Needed?

In some cases, patients desire additional improvement beyond two treatments. A small percentage (estimated at 10-15%) opt for a third session. This can provide incremental improvement, though the additional benefit is less dramatic than the second treatment. Discuss with your provider based on your results.

Cost Analysis

In the UK: miraDry costs roughly £1,500–3,000 privately and is not routinely commissioned on the NHS. There are relatively few UK providers. Compare it against the alternatives with our UK treatment cost calculator.

The figures below are US market prices, included for reference.

How strong is the evidence? Weaker than the marketing suggests. The widely quoted figures come from a small open-label evaluation of 31 adults, not a randomised sham-controlled trial. The UK's NIHR Health Technology Assessment, which reviewed the evidence for microwave therapy, found only one eligible study and concluded there was no evidence of a significant difference in sweat reduction at up to six months, with insufficient evidence on safety. Patient-reported severity did improve. We have removed the precise percentages this page previously quoted, because the evidence does not support that precision.

How Much Does miraDry Cost?

Pricing varies significantly by geographic region and provider. Urban areas and coastal cities tend to be at the higher end. Some providers offer package pricing for both sessions.

On the NHS

There is no national NICE guideline for hyperhidrosis, so what is funded beyond first-line antiperspirant is decided locally by your Integrated Care Board. That is why availability genuinely varies by area. Your GP is the route to finding out what yours commissions — see our guide to hyperhidrosis treatment on the NHS.

Cost Comparison Over Time

Despite the higher upfront cost, miraDry can be more economical long-term than recurring treatments:

The break-even point versus Botox typically occurs around 18-24 months. After that, miraDry's permanent results represent pure savings.

Who Is a Good Candidate?

Ideal Candidates

miraDry works best for people who:

• Have moderate to severe axillary hyperhidrosis
• Are 18 years or older
• Haven't responded adequately to clinical antiperspirants or want to move beyond temporary solutions
• Are specifically troubled by underarm sweating (as opposed to hands, feet, or generalized sweating)
• Want a permanent solution without the risks of surgery
• Can afford the upfront cost
• Can tolerate a few days of downtime

Who Should Think Twice

miraDry may not be the best choice if:

• Your primary concern is palmar, plantar, or craniofacial hyperhidrosis (miraDry only treats underarms)
• You have a pacemaker or other electronic implant
• You need supplemental oxygen
• You have active skin infection in the underarm area
• You can't avoid intense exercise for 2 weeks
• Budget is extremely tight (consider iontophoresis or medications as more affordable options)

miraDry and Body Odour

An often-overlooked benefit: miraDry destroys apocrine glands (responsible for body odour) along with eccrine glands (responsible for sweating). Many patients report near-elimination of underarm odour in addition to sweat reduction. In clinical studies, many patients report reduced underarm odour.

miraDry and Underarm Hair

miraDry also also reduces underarm hair growth after two treatments. This occurs because the energy disrupts hair follicles in the treatment zone. For patients who currently shave or wax their underarms, this is a welcome bonus.

Effectiveness: What the Research Shows

Clinical Trial Data

The pivotal clinical trial supporting miraDry's FDA clearance was a prospective, multi-centre, randomized controlled study published in Lasers in Surgery and Medicine:

• Participants reported a marked reduction in underarm sweating, though the measured difference versus control was not statistically significant in the systematic review
• 90% of patients reported significant improvement (shifting from HDSS 3-4 to HDSS 1-2)
• Results sustained at long-term follow-up (2+ years), confirming permanence
• Most patients in the published series said they would recommend the procedure

Real-World Outcomes

Real-world data from large provider networks largely mirrors the clinical trial results. Provider-reported post-market data suggests:

• Average gravimetric sweat reduction: 79%
• Patient satisfaction rate: 91%
• Repeat treatment rate (third session): 12%
• Serious adverse event rate: under 0.5%

What the reduction actually feels like

Numbers are one thing; daily experience is another. For most patients who respond, the change translates to:

• No visible sweat marks on shirts throughout a normal day
• No need for antiperspirant in most conditions (some patients use a light application for peak summer days)
• Ability to wear light-coloured and fitted clothing without anxiety
• Significant reduction in odour
• An overall sense of normalcy that many describe as life-changing

It does not typically mean:

• Zero perspiration (some residual moisture is normal and healthy)
• Bone-dry underarms during intense exercise
• Elimination of sweating if you also have generalized hyperhidrosis

Limitations and Considerations

It's Only for Underarms

This bears repeating: miraDry currently treats only axillary hyperhidrosis. If you also have sweaty hands, feet, face, or generalized hyperhidrosis, you'll need additional treatments for those areas. Many patients combine miraDry for underarms with iontophoresis for hands/feet or prescription medications for generalized sweating.

Will I Overheat?

A natural concern — if you destroy underarm sweat glands, can your body still cool itself? The answer is yes. Your underarms contain only about 2% of your body's sweat glands. Removing them doesn't meaningfully impact thermoregulation. Clinical studies have confirmed no adverse effects on body temperature regulation after miraDry treatment.

The Swelling Is Real

Patient forums and reviews consistently mention that the post-procedure swelling is more significant than many providers initially suggest. Expect your underarms to be noticeably swollen and tender for 3-7 days. This is normal — it's not a complication, but it's worth planning around. Having ice packs ready and wearing loose clothing is essential.

Numbness

Temporary altered sensation in the underarm skin is common (reported by roughly 40% of patients). This typically manifests as numbness, tingling, or hypersensitivity. It almost always resolves within 2-6 weeks, though rare cases may take several months.

miraDry vs. Other Treatments

miraDry vs. Botox

Choose miraDry if: You want permanent results, are primarily concerned about underarms, and can afford the upfront cost.

Choose Botox if: You need treatment for multiple areas (hands, feet, face), prefer to start with a reversible treatment, or have insurance that covers it.

Many patients start with Botox to confirm that reduced underarm sweating meets their expectations, then transition to miraDry for permanence. For a full side-by-side breakdown of costs, results, and candidacy, see our Botox vs miraDry comparison.

miraDry vs. ETS Surgery

Choose miraDry if: You want permanent underarm sweat reduction with minimal risk.

Choose ETS surgery only if: You have severe, debilitating palmar hyperhidrosis that hasn't responded to any other treatment. ETS carries much higher risks, particularly compensatory sweating, which can be worse than the original condition.

miraDry vs. Prescription Medications

Choose miraDry if: Your primary concern is underarm sweating and you want a targeted, permanent solution.

Choose medications if: You have multi-area sweating, need an affordable option, or want something you can start immediately.

Frequently Asked Questions

Is miraDry painful?

The numbing injections cause brief discomfort (similar to dental anesthesia), but the procedure itself is painless due to local anesthesia. Post-procedure soreness is comparable to a moderate bruise and lasts 3-7 days. Most patients manage with ibuprofen and ice packs.

How permanent is miraDry?

The results are considered permanent because destroyed sweat glands do not regenerate. Long-term follow-up studies (5+ years) confirm sustained results. It's worth noting that miraDry doesn't destroy every single sweat gland — some residual sweating (approximately 18% of pre-treatment levels) is expected and normal.

Can miraDry be done on hands or feet?

Not currently. The technology is designed specifically for the anatomical characteristics of the underarm. Using microwave thermolysis on hands or feet would risk damage to superficial nerves, tendons, and other structures. Treatments for these areas include iontophoresis and Botox.

How many sessions do I need?

The standard protocol is two sessions spaced 3 months apart. Most patients achieve excellent results with this protocol. Approximately 10-15% of patients opt for a third treatment for additional improvement.

Can I go back to work the next day?

Technically yes, but most patients prefer to take 1-2 days off. Your underarms will be swollen and sore, and raising your arms may be uncomfortable. Desk work is feasible the day after; physically demanding jobs may require 3-5 days off.

Does miraDry work for everyone?

miraDry is effective for the vast majority of patients — published series report high satisfaction. However, results vary. Some patients experience a 90%+ reduction in sweating, while others see a more modest reduction. Setting realistic expectations is important: miraDry significantly reduces sweating but may not eliminate it entirely.

Will I smell without antiperspirant after miraDry?

Most patients find they need significantly less (or no) deodorant after miraDry. The procedure destroys apocrine glands that produce the proteins bacteria feed on to create body odour. In studies, 89% of patients reported meaningful odour reduction.

Is there any risk of compensatory sweating?

Unlike ETS surgery, which carries roughly a 60% risk of compensatory sweating, miraDry has not been associated with significant compensatory sweating. Because miraDry only affects about 2% of your total sweat glands, the body doesn't typically respond by increasing sweating elsewhere.

Sources

1. Hong HC, et al. "A prospective, multi-centre, randomized, sham-controlled study of the safety and efficacy of a microwave device for treating axillary hyperhidrosis." Lasers in Surgery and Medicine. 2012;44(6):457-465.
2. Glaser DA, et al. "A randomized, blinded clinical evaluation of a novel microwave device for treating axillary hyperhidrosis: the dermatology experience." Dermatologic Surgery. 2012;38(2):185-191.
3. Johnson JE, et al. "Microwave thermolysis of sweat glands." Lasers in Surgery and Medicine. 2012;44(1):20-25.
4. Lupin M, et al. "Long-term efficacy and quality of life assessment for treatment of axillary hyperhidrosis with a microwave device." Dermatologic Surgery. 2014;40(7):805-807.
5. Suh DH, et al. "Comparative histological effects of a microwave device for sweat gland ablation." Dermatologic Surgery. 2017;43(8):1069-1072.
6. International Hyperhidrosis Society. "miraDry." www.sweathelp.org. Accessed March 2026.

Getting this treated in the UK

What the NHS will fund, what needs a referral and what you will have to pay for privately varies by area. Our guide to hyperhidrosis treatment on the NHS walks through the route from GP appointment to dermatology referral.