Hyperhidrosis: Treatment
for Excessive Sweating

Hyperhidrosis is sweating that goes well beyond what the body needs to cool itself. It most often affects the underarms, palms, soles, and face, and it is a medical condition, not a hygiene problem. Effective treatments exist at every level, from clinical-strength antiperspirants and prescription wipes to iontophoresis, Botox injections, and oral medication. Belaray Dermatology treats hyperhidrosis at both of its Long Island offices, in Hicksville and Stony Brook.

What Is Hyperhidrosis?

Sweating is how the body regulates temperature. In hyperhidrosis, the sweat glands are switched on far more than cooling requires, often in a few specific areas and often without any heat, exercise, or stress to explain it. An estimated 4.8 percent of people in the United States, roughly 15 million, live with the condition, and fewer than half have ever discussed it with a health professional.

There are two types:

• Primary focal hyperhidrosis is the common form. It affects specific areas, usually on both sides of the body (both underarms, both palms, both soles, or the face and scalp), typically starts in childhood or adolescence, often runs in families, and stops during sleep. It is caused by overactive nerve signals to normal sweat glands, not by a disease elsewhere in the body.
• Secondary hyperhidrosis is sweating caused by something else: a medication, an overactive thyroid, diabetes, menopause, an infection, or another medical condition. It tends to be more generalized, can begin at any age, and may happen during sleep.

How Do I Know If My Sweating Is Hyperhidrosis?

Dermatologists look for a pattern rather than a single measurement. Sweating is likely hyperhidrosis when it has lasted six months or longer and includes at least two of the following:

• It affects both sides of the body about equally.
• It happens at least once a week.
• It interferes with daily activities: slippery hands at work, ruined clothing, avoiding handshakes, changing shirts during the day.
• It started before age 25.
• A parent or sibling has the same problem.
• It stops while you sleep.

How Is Hyperhidrosis Treated at Belaray?

Treatment is matched to where you sweat and how much it affects your life. Most patients start with the simplest option and step up only if needed. Many combine two approaches.

1. Clinical-Strength Antiperspirants

Antiperspirants containing aluminum chloride (typically 10 to 20 percent, available over the counter at the lower strengths and by prescription at the higher ones) plug the sweat ducts. Apply to completely dry skin at bedtime, when the glands are least active, and wash off in the morning. They work on the underarms, hands, and feet. Irritation is the main side effect and usually improves with less frequent use or a mild hydrocortisone cream.

2. Prescription Topical Wipes

Glycopyrronium cloths (Qbrexza) are a once-daily prescription wipe for underarm sweating, approved for ages 9 and up. They block the nerve signal that triggers the sweat gland. Dry mouth and blurred vision can occur if the medication is transferred to the eyes or mouth, so hand washing after use matters.

3. Iontophoresis for Hands and Feet

Iontophoresis passes a gentle electrical current through tap water while the hands or feet are submerged. It temporarily shuts down the sweat glands and is one of the most effective treatments for palms and soles. Sessions last 20 to 30 minutes, several times a week at first, then taper to maintenance every one to four weeks. Belaray offers in-office iontophoresis at our Hicksville office and can advise on home units once a routine is established. It is not used in patients who are pregnant or who have a pacemaker or metal implants in the treated area.

4. Botox Injections

Botox is FDA-approved for severe underarm hyperhidrosis that has not responded to antiperspirants, and dermatologists also use it for the palms, soles, and forehead. A series of small injections blocks the nerve signal to the sweat glands in the treated area. Sweating drops within a week and the effect lasts about 4 to 12 months, most often around 6. Botox is available at both Belaray offices. At our Hicksville office, Zimmer cold-air cooling is available to reduce discomfort during injections, which helps most for the palms.

5. Oral Medication

For sweating that affects large areas or several sites, oral anticholinergic medicines such as glycopyrrolate or oxybutynin reduce sweating throughout the body. Dry mouth, constipation, and blurred vision limit the dose for some patients, so these are prescribed and monitored by your dermatologist.

Other Options

Microwave-based gland destruction and, in rare severe cases, surgery on the sympathetic nerves also exist. We discuss these when the steps above have not provided enough relief and can coordinate a referral when appropriate.

Does Insurance Cover Hyperhidrosis Treatment?

Hyperhidrosis is a recognized medical diagnosis, so the evaluation, prescription antiperspirants and wipes, iontophoresis, and oral medication are generally treated as medical care. Botox for severe underarm sweating is often covered once antiperspirants have failed, usually with prior authorization. Coverage for palms, soles, and face varies by plan. These are also eligible expenses for a flexible spending or health savings account; see our FSA and HSA guide. Our team can tell you what your plan requires before you schedule.

What Can I Do at Home?

• Apply antiperspirant at night to dry skin, not in the morning after a shower.
• Choose breathable fabrics (cotton, merino, moisture-wicking synthetics) and change socks during the day if your feet sweat.
• Use absorbent underarm shields or shoe insoles.
• Alternate shoes so each pair dries fully, and go barefoot at home when you can.
• Keep a log of when sweating is worst; it helps your dermatologist tailor treatment.
• Treat skin problems that excess moisture causes, such as athlete’s foot or irritation in the folds, before they spread.

When Should I See a Dermatologist?

If sweating is interfering with your work, school, relationships, or clothing, or if over-the-counter antiperspirants have not helped after a few weeks, it is time for an evaluation. Hyperhidrosis is underdiagnosed largely because patients assume nothing can be done. A single visit can confirm the type, rule out secondary causes, and start a treatment plan the same day.

Frequently Asked Questions

Is hyperhidrosis a medical condition?

Yes. Hyperhidrosis is a recognized medical diagnosis in which the sweat glands produce far more sweat than the body needs for cooling. It affects an estimated 4.8 percent of people in the United States. It is not caused by poor hygiene, and it is treatable.

Does Botox work for excessive sweating, and how long does it last?

Yes. Botox is FDA-approved for severe underarm hyperhidrosis and is also used for the palms, soles, and forehead. A series of small injections blocks the nerve signal to the sweat glands. Sweating decreases within about a week, and the effect typically lasts 4 to 12 months, most often around 6 months, after which treatment can be repeated.

Does iontophoresis really work for sweaty hands and feet?

Yes. Iontophoresis, which passes a mild electrical current through tap water while the hands or feet are submerged, is one of the most effective treatments for palm and sole sweating. Most patients need several 20- to 30-minute sessions a week at first, then maintenance every one to four weeks. It is painless for most people, with a mild tingling sensation.

Can hyperhidrosis be cured?

Primary hyperhidrosis is a long-term condition, but it is very controllable. Antiperspirants, prescription wipes, iontophoresis, and Botox each reduce sweating for weeks to months and can be repeated or combined. Secondary hyperhidrosis often resolves once the underlying cause, such as a medication or thyroid problem, is treated.

Why do I sweat so much even when I am not hot?

In primary focal hyperhidrosis, the nerves that control the sweat glands fire far more than cooling requires, so sweating happens regardless of temperature, often in response to nothing at all. It commonly affects the underarms, palms, soles, or face on both sides, starts before age 25, runs in families, and stops during sleep.

Is excessive sweating a sign of something serious?

Usually not. Most excessive sweating is primary focal hyperhidrosis, which is not dangerous. However, sweating that begins in adulthood, affects the whole body, soaks the sheets at night, or comes with weight loss, fever, or a racing heart can signal an underlying condition such as thyroid disease, diabetes, an infection, or a medication side effect, and should be evaluated.

Does insurance cover Botox for sweating?

Often, yes, for severe underarm hyperhidrosis that has not responded to antiperspirants. Most plans require prior authorization and documentation that conservative treatment failed. Coverage for the hands, feet, and face varies by plan. Belaray’s team can check your plan’s requirements before you schedule.

Related reading: Botox and Xeomin, men’s skin care, contact dermatitis and patch testing, our FSA and HSA guide, and the patient education hub.