Why Are My Palms So Sweaty?

You wipe your hand on your pants before the handshake. Then the pen slips, and your phone won’t read your thumb. By lunch you’ve stopped reaching for anything paper.

What counts as too much

The AAD² calls hyperhidrosis a treatable medical condition that makes people sweat excessively. You may have it if you sweat heavily in a cool room, or when others find the temperature comfortable, or when you eat certain foods or hit a stressful moment.

Many people have it in one spot. The AAD² says that spot is often the palms, and other common sites are the underarms, soles of the feet and head.

Stress can set it off. The root, though, is the nerves.

The NHS³ gives markers for when to bring it to a doctor: sweating that has lasted at least 6 months, happens at least once a week, and gets in the way of daily activities.

Why the palms

The AAD² calls the usual kind primary hyperhidrosis, where excessive sweating happens in one or two areas such as the underarms, palms, soles or head. Two risk factors stand out. One is a blood relative with excessive sweating. The other is age: being 24 or younger.

A 2024 review in the British Journal of General Practice agrees. Primary hyperhidrosis typically begins in childhood or adolescence, shows up in specific areas, and has a genetic component in 30 to 50% of cases.

So a mother or aunt with damp hands is a clue.

When it’s something else

The less common kind is secondary hyperhidrosis. The AAD¹ says it comes from a medication you take or another medical condition. The medicines it names include some antibiotics, antivirals, insulin and antidepressants. The conditions include diabetes, Parkinson’s disease, rheumatoid arthritis, heart failure, stroke and menopause.

There’s a quick way to tell the two apart. The AAD¹ says that with primary hyperhidrosis, sweating stops while you’re asleep. Secondary hyperhidrosis can cause sweating at night, and that may signal an underlying condition that needs evaluation.

The British Journal of General Practice⁴ review lists the warning signs: sweating all over rather than in one area, night sweats, weight loss or palpitations, sudden onset in adulthood, and other symptoms alongside it.

For a woman in perimenopause, this matters, because the AAD¹ lists menopause among the conditions behind secondary sweating. New palm sweating in your 40s or 50s is worth mentioning.

What helps

The AAD⁵ says antiperspirant is the usual first move. Non-prescription versions work for mild cases. Most people need prescription strength, applied to dry skin at bedtime until the sweating is controlled, usually within weeks, then once or twice a week to maintain. The NHS³ says a pharmacist can recommend a stronger antiperspirant. The British Journal of General Practice⁴ review says studies show aluminum salts can control sweating in up to 80% of mild to moderate cases, applied to clean, dry skin at night.

For hands, the AAD⁵ describes iontophoresis: a machine that passes an electrical current through tap water to reduce sweating in the hands and feet. You usually see noticeably less sweating after 5 to 10 treatments, and maintenance is weekly or every other week.

Botulinum toxin injections reduce sweat where they’re placed. The AAD⁵ says results appear within 7 to 10 days and last 3 to 10 months on the underarms and hands.

Oral medicines can reduce sweating all over the body. They can also cause dry mouth, constipation and vision changes, and the AAD⁵ says to avoid heat exposure on them, since less sweating makes it harder for your body to cool down.

Then there’s surgery. A sympathectomy cuts the nerves to the affected area. The AAD⁵ warns of compensatory sweating, where other parts of the body sweat more. It’s a trade-off some patients accept.

And the honest bottom line: the AAD² says there’s no cure for hyperhidrosis at this time, but treatment can manage it. A board-certified dermatologist can diagnose the condition and build a plan.

The play

Try this: answer four questions before you book

Does the sweating go away while you sleep?

Is it in one or two spots, or everywhere?

When did it start, and does anyone in your family have it?

Is it new since you started a medicine, or since menopause began?

Those answers map onto the markers the AAD¹ and the review use to sort primary from secondary.

When to get checked

The NHS³ lists night sweats, a family history of excessive sweating, and sweating as a medication side effect among the reasons to see a GP, along with sweating that has gone on for 6 months or more and gets in the way of your life. The AAD² recommends a dermatologist for diagnosis and an individualized treatment plan.

See a clinician if any of these fit:

• Palm sweating has lasted 6 months or longer, or happens at least weekly
• It interferes with work, writing, or relationships
• You sweat at night, or all over your body
• It began suddenly in adulthood
• You’ve lost weight without trying, or you feel your heart racing
• It started after a new medicine

That handshake doesn’t have to be a negotiation with your own hand. The first thing to learn is which kind of sweaty you are.