Botox for sweating: underarms, hands and feet, cost and insurance

Botox is the brand name for onabotulinumtoxinA, a prescription drug that blocks the release of acetylcholine at nerve endings, producing a partial, localized reduction in muscle activity; the label explains that reinnervation slowly reverses the effect.

For sweating, the drug is Botox itself, not a separate product: Botox and Botox Cosmetic contain the same active ingredient in the same formulation, but they carry different labeled indications.

The sweating approval sits on the therapeutic Botox label, not on the Botox Cosmetic label that covers frown lines and the other wrinkle areas.

That cosmetic side of the drug is its own topic, and the Botox guide on this site covers it in depth.

On the label, an underarm treatment is mapped first — the sweaty area is defined with a Minor's iodine-starch test — and then injected at a dose of 50 units per armpit, 100 units in total, across 10 to 15 spots about 1 to 2 cm apart.

The American Academy of Dermatology (AAD) says most patients notice less sweating within 7 to 10 days of being treated.

The approved use is narrow: severe primary axillary (underarm) hyperhidrosis that is inadequately managed with topical agents.

The FDA approved that indication on July 19, 2004.

The label then draws the line clearly: safety and effectiveness of Botox for sweating in other body areas — hands, feet and face among them — have not been established.

Botox for hand, foot or scalp sweating is therefore off-label.

Palms and feet appear on no current US neurotoxin label.

Off-label is a statement about the label, not about whether anyone does it: the AAD says dermatologists use botulinum toxin for excessive sweating of the underarms, hands, feet and face.

For those other areas, the label carries a specific warning: weakness of hand muscles may occur in patients treated for palm sweating, and drooping of the eyelid (blepharoptosis) in patients treated for facial sweating.

Age matters as well: the label says safety and effectiveness for underarm hyperhidrosis have not been established in patients under 18.

Providers price botulinum toxin per unit or per treatment area, and an area's price works out to roughly its unit count times the price per unit.

Underarms have a fixed labeled dose, which makes the arithmetic concrete: 50 units per armpit, 100 units for both, so a treatment's cost scales directly with the per-unit price a provider charges.

Beyond that structure, we could not confirm a national price.

The ASPS 2025 statistics report omits fees for minimally invasive procedures, and we could not retrieve the 2023 and 2024 ASPS reports or cost-aggregator pages, so we have no current national average fee for neuromodulators to quote.

We also found no primary or professional-body national price for hyperhidrosis treatment.

A $750 to $1,250 range for underarm treatment is one we could not verify against any source, so treat any range you see as unconfirmed and ask offices for their per-unit price and their total for a 100-unit underarm treatment.

Insurance is the part that can change the math.

The AAD says botulinum toxin for signs of aging is not covered, while treatment of excessive sweating may be covered, at least partly, depending on the plan — and it advises contacting your insurance company to find out what your policy covers.

The medical criterion written on the label — severe underarm sweating inadequately managed with topical agents — is what the treatment is approved around.

But the AAD's own wording makes coverage a per-plan question, so your plan documents and your insurer's answer are the source of truth for your case.

Other options come before Botox in the AAD's description of hyperhidrosis care: prescription antiperspirants, and FDA-approved underarm medications such as a glycopyrronium cloth and a sofpironium gel (age 9 and up).

In the Botox axillary hyperhidrosis trial, the median duration of response after the first treatment was 201 days — about six and a half months.

A trial median describes the study group, not what any one person will get.

The AAD's patient-facing figures are ranges: 3 to 10 months for underarms or hands, 3 to 6 months for feet, and about 4.5 months for the face.

The trial's 201-day median is a different measure from wrinkle treatment, where the Botox Cosmetic label gives frown lines approximately 3 to 4 months.

How wrinkle results fade, and what changes that timeline, is its own topic — see how long Botox lasts.

The treatment is real needle work: the labeled protocol places 10 to 15 injections per armpit, and pain leads the AAD's list of the most common side effects, which continues with bruising, headache, muscle soreness or weakness where injected, and mild itching.

The Botox label's own tally for the underarm use, drawn from double-blind studies, puts its most frequent adverse reactions at 3 to 10% of adult patients: injection-site pain and bleeding, sweating elsewhere on the body (non-axillary sweating), infection, sore throat, flu-like symptoms, headache, fever, neck or back pain, itching and anxiety.

Those figures are rates reported in studies, not a forecast for any individual.

Because Botox is a prescription drug, AmSpa's position is that injecting it is the practice of medicine: it must be done by a physician, an independent-practice nurse practitioner, or another licensed professional acting within their scope, under rules that vary by state.

Hyperhidrosis treatment also has a step before any needle: the label advises evaluating for causes of secondary hyperhidrosis, such as an overactive thyroid (hyperthyroidism), before treatment.

The AAD's description of hyperhidrosis care moves through prescription antiperspirants and the FDA-approved underarm medications before botulinum toxin, and it is dermatologists the AAD describes using botulinum toxin for sweating of the underarms, hands, feet and face.

So the decision is less about the sign on the door than about who does what: the diagnosis, the evaluation for secondary causes and the prescription are medical work, and, in AmSpa's reading, the injection itself must sit with a licensed professional working within their state's rules wherever it happens.

The CDC's consumer advice is the floor: get botulinum toxin injections only from a licensed, trained provider using product from an authorized source, and know that even FDA-approved product given correctly is "not risk-free".

The label's protocol also gives you concrete things to listen for in a consultation: mapping the sweaty area with a Minor's iodine-starch test before injecting, and a dose described as 50 units per armpit across 10 to 15 spots.

Prices are local, and this page cannot confirm a national figure, so asking each office for its price per unit and its total for a full 100-unit underarm treatment is the direct way to compare.

For the wider vetting checklist — credentials, red flags, the questions worth asking before you book — see how to choose a med spa.