MiraDry is a noninvasive procedure that uses microwave energy to permanently destroy sweat glands in the underarms. It was cleared by the FDA in 2011 for treating hyperhidrosis (excessive sweating) and has since become one of the most popular alternatives to repeated Botox injections for people who sweat heavily through their clothing or deal with persistent underarm odor.
How MiraDry Works
The device delivers precisely targeted microwave energy into the skin where sweat glands sit. This energy heats and destroys the glands through a process called thermolysis. At the same time, the device cools the surface of your skin to protect it from burns. Because sweat glands do not regenerate once they’re eliminated, the treated glands are gone for good. The remaining sweat glands across the rest of your body continue to function normally, so your body can still regulate temperature without any issues. Your underarms contain only about 2% of your body’s total sweat glands.
The procedure also reduces underarm odor. Odor-producing glands sit in the same layer of skin as sweat glands, so they’re destroyed during the same treatment. Some patients also notice a reduction in underarm hair growth, though this isn’t the primary goal.
What Happens During the Procedure
MiraDry is performed in a doctor’s office and typically takes about one hour. Before the device touches your skin, your provider numbs both underarms with local anesthetic injections. A temporary tattoo-like template is applied to your underarm to guide the placement of the handpiece, ensuring even coverage across the treatment area.
Once the numbing takes effect, the handpiece is pressed against the skin in overlapping sections. Most people feel a sensation of pressure and warmth but no significant pain during the treatment itself. The discomfort from the numbing injections beforehand is usually the most uncomfortable part of the experience.
How Many Sessions You’ll Need
Most people see a major improvement after a single session. In a clinical study published in Aesthetic Plastic Surgery, 86% of treated underarms showed no or minimal sweating six months after one treatment. After completing a full course (one or two sessions), 95% of patients had no or minimal sweating.
A second session, typically scheduled about three months after the first, is common for people who want maximum reduction. Some patients are satisfied enough after one treatment that they skip the second. Your provider will help you assess your results and decide.
Results and How Long They Last
The reduction in sweating is considered permanent for the glands that are destroyed. Multiple clinical sources confirm that once underarm sweat glands are eliminated by miraDry, they do not grow back. In patient satisfaction surveys, over 83% of treated individuals rated their sweating as either nonexistent or tolerable after completing treatment, compared to the heavy, uncontrollable sweating they experienced before.
That said, “permanent” doesn’t always mean 100% dryness. Some glands in the treatment zone may survive, and results can vary depending on the severity of your sweating and how your tissue responds. Most providers describe the outcome as a dramatic, lasting reduction rather than a complete elimination. For the vast majority of patients, this is enough to stop visible sweat stains and significantly reduce odor.
Recovery and Side Effects
Because miraDry is noninvasive (no cuts, no stitches), the recovery period is short. Most people take the rest of the treatment day off to rest and ice their underarms, then return to normal activities the next day. Swelling and soreness are the most common side effects, and both typically fade within a week. Bruising and a bumpy texture under the skin are also normal and resolve on the same timeline.
Some people experience temporary numbness or tingling in the underarm area or upper arm, which can last a few weeks. Serious complications are rare. You’ll want to avoid intense exercise for several days to keep swelling down, but light daily activity is fine immediately after the procedure.
MiraDry vs. Botox for Sweating
Botox is the other major treatment for underarm sweating, and the two work very differently. Botox temporarily blocks the nerve signals that tell sweat glands to activate. It’s effective, but the results wear off after four to six months, meaning you need repeat injections two or three times a year to maintain the effect. Over several years, those costs and appointments add up significantly.
MiraDry destroys the glands themselves, so results are long-lasting after one or two sessions with no ongoing maintenance. This makes it a better fit for people who want a one-time solution and don’t want to commit to repeated office visits. Botox may still make sense as a first step for people who want to test the waters before committing to a permanent procedure, or for those who sweat excessively in areas miraDry can’t treat (like the hands or feet).
Cost
MiraDry typically costs between $2,500 and $3,000 for a full course of two treatments, according to the International Hyperhidrosis Society. Some providers charge per session, so a single treatment might run $1,500 to $2,000 depending on your location. The procedure is generally not covered by insurance because it’s classified as elective, though some plans may offer partial coverage if you have a documented diagnosis of primary hyperhidrosis. It’s worth calling your insurer to check before booking.
Compared to Botox, which can cost $1,000 or more per session and needs repeating every four to six months, miraDry often ends up being the more cost-effective option within a year or two.
Who Is a Good Candidate
MiraDry is designed for adults who experience excessive underarm sweating that interferes with daily life, whether that means soaking through shirts, constantly reapplying deodorant, or avoiding certain clothing colors. You don’t need a formal hyperhidrosis diagnosis to get the treatment, though many providers will assess the severity of your sweating during a consultation.
Certain people should not get miraDry. The procedure is contraindicated if you have an implanted pacemaker, defibrillator, or any other implantable electrical device, because microwave energy can interfere with these devices. It’s also not recommended during pregnancy or for anyone with a history of allergic reactions to local anesthesia. If you’ve had previous surgery in the underarm area or have an active skin condition there, your provider will need to evaluate whether you’re a safe candidate.