Handinnenflächen · BTX-Therapie palmare Hyperhidrose mit Nervenblockade · Praxis Dr. Thomas Ackermann

Hyperhidrosis Hands

Individual cost plan after consultation

A handshake that becomes something to dread. Palmar hyperhidrosis is well treatable — what has held many people back so far was never the efficacy of the treatment, but the pain of injecting into the palm. Here, regional anesthesia to clinical standard is placed first: a hand block via the median and ulnar nerves, or an arm plexus block if needed. The hand is numb before the first injection is given.

Hyperhidrosis · Palms

Hyperhidrosis Hands

A handshake that becomes something to dread. A keyboard that turns damp. A signature that leaves a mark on the paper. Palmar hyperhidrosis is well treatable — what has held many people back so far was never the efficacy of the treatment, but the pain of injecting into the palm itself. That is exactly what is solved differently here: regional anesthesia to clinical standard, placed before the first injection is given.

A note on terminology: Many patients search for “Botox” — a brand name of one single product that has become a colloquial umbrella term. The active substance is botulinum toxin type A, contained in several licensed medicinal products. All of them are prescription-only and are injected exclusively by the physician after a medical examination. This page uses the substance name throughout — it refers to the same treatment commonly known as a Botox treatment.

Onset3–7 daysFull effect after about two weeks.

Duration of effect4–8 monthsTends to be shorter on the hand than in the underarm.

Treatment time30–45 minIncluding the regional anesthesia and checking its effect.

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Context

Why the anesthesia decides the outcome of this treatment: The nerve density of the palm is among the highest in the body, and one treatment involves twenty to forty injections per hand. Numbing cream does not reach down to the level of the sweat glands. Without regional anesthesia, the treatment is therefore barely tolerable for most people — and that, not the active ingredient, is what causes it to fail in practice. The British health-technology-assessment review on hyperhidrosis explicitly states that clinicians and patients regard a trial of botulinum toxin with anesthesia on the hand as the most pressing open question. That describes exactly the procedure offered here.

Dr. Thomas Ackermann's practice · Methodological stance

I don't promise a pain-free treatment — I offer regional anesthesia to clinical standard, and that is something different. It isn't the botulinum toxin that makes treatment of the hand feasible, it's the block placed beforehand. I plan for that from the outset instead of improvising along the way.

— Dr. med. Thomas Ackermann · Board-certified anesthesiologist

Procedure

Two ways to anesthetize the hand

Which procedure is used is decided during the consultation — based on findings, the extent of the area, and your own preference. Both are established techniques from everyday clinical anesthesiology.

Procedure	How it works	What it means for the day
Hand block at the wrist	Targeted block of the median and ulnar nerves at the wrist, supplemented by the superficial branch of the radial nerve. Two to three injections per hand	The hand is numb; the arm muscles remain largely functional. The anesthesia wears off over a few hours
Arm plexus block	Block of the nerve plexus further up the arm; covers a larger area and is chosen when the hand block is not sufficient or not well suited	The entire arm has limited motor function for several hours. Someone to accompany you home is required, and driving on the day of treatment is out of the question

The effect of the anesthesia is checked before the first injection is placed. Both hands are usually treated in one appointment; with a bilateral plexus block, the limitation would affect both arms, which is why the anesthesia concept is planned individually. Regional anesthesia has its own risk profile, which is part of the disclosure discussion.

Common reasons patients come in

Does this sound familiar?

"I've avoided shaking hands for as long as I can remember"

The most common sentence in this consultation. Reviews on disease burden describe career choices, job interviews and relationships as the areas where the palmar form has the strongest impact — not the amount of sweat itself, but what people avoid because of it.

"I tried the treatment once and stopped partway through"

That is not a question of pain tolerance, but of preparation. Without effective regional anesthesia, twenty to forty injections into the palm are barely tolerable for most people. With a placed and checked block, the hand is numb before starting — you then no longer feel the injections themselves.

"I'm worried I'll lose strength in my hand afterward"

A legitimate question, because the muscles responsible for fine motor control lie close under the skin. In the placebo-controlled study on the hand, grip and hand strength remained unchanged — that was specifically measured there. A temporary reduction in strength cannot be entirely ruled out; it depends on injection depth, and that is exactly the decisive point here.

Important to know

Setting the right expectation

Treatment day is not a normal working day. After a hand block, the hand is numb for several hours; after a plexus block, the entire arm has limited motor function. Driving is out of the question, and so is any fine-motor task. Plan for someone to accompany you home — that is not a formality.
As long as the hand is numb, the warning function is missing. No hot drinks, no stovetops, no sharp tools until sensation has fully returned. Burns and cuts go unnoticed in this state.
Duration of effect is shorter on the hand. Typically four to eight months, on average less than in the underarm — the region is under greater mechanical strain. Plan for two treatments a year, not one.
Temporary reduction in strength is possible. In the controlled study with botulinum toxin type A, grip strength remained unchanged; it is nonetheless described in the literature, particularly with deeper injection. It resolves within a few weeks. Dose distribution is adjusted to reduce the risk — it cannot be entirely ruled out.
The evidence base is thinner than for the underarm. The available studies on the hand are small; the strong evidence comes from the underarm region. The guideline nonetheless lists botulinum toxin type A as an established treatment for the palmar form — but the figures you get for the underarm do not carry over unchanged here.

Before the indication

What is clarified first

Question	What it is based on	Consequence
Primary palmar hyperhidrosis?	Symmetrical, confined to the palms, usually since adolescence or young adulthood, typically absent during sleep	The indication addressed here — treatment per the step-wise scheme
Secondary cause?	Night sweats, sudden onset in adulthood, generalized finding, weight loss, fever, abnormal thyroid function	Work-up comes first — laboratory testing and, where needed, referral. Only then does the question of injection arise
Medication reviewed?	Temporal link to a new medication; blood-thinning agents also increase the tendency to bruise	Reviewed before treatment; with blood thinners the approach is adjusted, not cancelled
Simpler step tried?	Aluminum-chloride antiperspirants and tap-water iontophoresis are the earlier steps; for iontophoresis on the hand there is consistent, if weak, evidence	If not yet tried or not exhausted, this is discussed first — even with a clear wish for treatment
Contraindication?	Pregnancy, breastfeeding, certain neuromuscular diseases, acute skin condition in the treatment area, coagulation disorder	No treatment. Clarified in the initial consultation, before an appointment is scheduled

Why this practice

Anesthesia is the core discipline here, not an add-on.

A hand block via the median and ulnar nerves, an arm plexus block when needed — both are standard techniques from everyday clinical anesthesiology. That is the reason this region is treated here as a matter of routine rather than an exception. Anyone who cannot place the block routinely must either treat the hand unanesthetized or not offer the treatment at all.

Part of that is the ability to handle what can go wrong with regional anesthesia. As a board-certified anesthesiologist with an additional qualification in emergency medicine, that is not a co-managed extra risk for me — it is the field I trained for.

And the work-up beforehand stays in-house: this practice runs a general-medicine consultation with its own laboratory diagnostics. If thyroid function, hormone status or medication need checking, that doesn't require a second appointment elsewhere. If several regions are affected, feet are also treated here, alongside the underarms.

How your treatment works

Initial consultation and differentiationHistory, course, prior treatments, medication. Ruling out a secondary cause, with laboratory testing if needed, before any decision on treatment is made.
Choice of anesthesiaHand block or arm plexus — decided together, based on findings and suitability. Disclosure covering both procedures is given in writing, along with instructions for treatment day.
Regional anesthesiaTwo to three injections per hand. The effect is then checked — the actual treatment only begins once the anesthesia is reliably in place.
The injectionsTwenty to forty superficial injections per palm in an even grid, with injection depth matched to fine motor control. Usually both hands in one appointment.
Follow-upA fixed appointment after ten to fourteen days, once the effect has fully developed. This assesses whether the area was fully covered and adjusts if needed.

Frequently asked questions

The next step

The treatment doesn't fail because of the active ingredient.

It fails because of the anesthesia — and here that's planned, not improvised. Herzogenaurach, twelve minutes' drive from Erlangen.

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How painful is the treatment really?

Without regional anesthesia, most people describe it as very painful — which is why many stop partway through or never start at all. With a placed and checked hand block or arm plexus block, the hand is numb before the first injection. What you then still feel are the two to three injections of the anesthesia itself.

Why isn't numbing cream enough?

Because it only reaches the upper layers of skin. The injections need to go down to the level of the sweat glands, and the stratum corneum of the palm is also noticeably thicker than elsewhere. Topical anesthetics don't arrive there in an effective concentration.

Why can't I drive myself home afterward?

After a plexus block, the arm's motor function is limited for several hours; after a hand block, sensation in the hand is. Either way, you are not fit to drive. Arrange for someone to accompany you — plan treatment day accordingly, not squeezed between two other appointments.

Will my grip strength suffer afterward?

In the placebo-controlled study on the hand, grip and hand strength remained unchanged; that was specifically measured there. A temporary weakening of small hand muscles is nonetheless described in the literature, particularly with deeper injection. It resolves within a few weeks. That is why injection depth is the point that matters most in this region.

How long does the effect last?

Typically four to eight months — on average shorter than in the underarm, because the hand is under greater mechanical strain. The reliable duration figures come from underarm studies; the evidence base for the hand is smaller. After the first treatment, your individual duration can be estimated well.

Are both hands treated in one appointment?

Usually yes — that makes sense, because the symptoms are almost always on both sides. With a bilateral plexus block, however, the motor limitation would affect both arms; the anesthesia concept is therefore planned individually, if necessary with a bilateral hand block instead of a plexus block.

Are there alternatives I should try first?

Yes: aluminum-chloride antiperspirants and tap-water iontophoresis. For iontophoresis on the hand, the systematic review describes consistent, if weak, evidence. It requires persistence, since it is applied several times a week — for some people it is enough on its own, and then no injection is needed.

What do I need to know beforehand?

Please mention any blood-thinning medication or supplements in the consultation; the approach is then adjusted. No skin care products on the palms on treatment day. Come with time to spare — the anesthesia needs its onset time, and the appointment cannot be rushed.

When is this treatment not the right choice?

With unclarified secondary hyperhidrosis, during pregnancy and breastfeeding, with certain neuromuscular diseases, with coagulation disorders, and with an acute skin condition in the treatment area. Likewise when the earlier steps have not yet been seriously tried.

What does the treatment cost?

Medical services are billed per the German fee schedule (GOÄ) based on the services actually provided; the regional anesthesia is billed separately, plus the active ingredient by amount used. What applies in your case is broken down in the initial consultation, before an appointment is scheduled. For an overview, see Costs.

Evidence base

What the studies show

Lowe NJ et al., 2002. Efficacy and safety of botulinum toxin type A in the treatment of palmar hyperhidrosis: a double-blind, randomized, placebo-controlled study. Dermatol Surg 28(9):822–827. PMID 12269876. 19 participants, each receiving the active ingredient in one hand and saline in the other. Gravimetrically measured sweat output dropped significantly more on the treated hand; 17 of 17 rated the treatment successful versus 12% for the placebo side. Grip and hand strength remained unchanged under both conditions — the source for this page's statement on grip strength.
Wade R et al., 2017. Interventions for hyperhidrosis in secondary care: a systematic review and value-of-information analysis. Health Technol Assess 21(80):1–280. PMID 29271741. Systematic review of 50 studies commissioned by the UK health service. For the palmar form, the evidence for tap-water iontophoresis is described as weak but consistent; the evidence base for the remaining second-line procedures is limited. Clinicians and patients named a trial of botulinum toxin with anesthesia versus iontophoresis on the hand as the most pressing open question.
Baumann L et al., 2005. Double-blind, randomized, placebo-controlled pilot study of the safety and efficacy of Myobloc (botulinum toxin type B) for the treatment of palmar hyperhidrosis. Dermatol Surg 31(3):263–270. PMID 15841624. A study with the other toxin type: effective, mean duration of effect 3.8 months — but dry mouth in 18 of 20 participants and reduced grip strength in 50%. The reason type A is used here, and why results cannot be carried over between toxin types.
Naumann M, Lowe NJ, 2001. Botulinum toxin type A in treatment of bilateral primary axillary hyperhidrosis: randomised, parallel group, double blind, placebo controlled trial. BMJ 323(7313):596–599. PMID 11557704. The foundational study for the procedure, conducted on the underarm region: 94% response at four weeks versus 36% under placebo in 320 participants. It carries the proof of the principle's efficacy, not the figures for the hand.
Hamm H, 2014. Impact of hyperhidrosis on quality of life and its assessment. Dermatol Clin 32(4):467–476. PMID 25152339. Review of disease burden: the limitation arises mainly from avoidance behavior in career, education and relationships. The reason the indication is based on burden of suffering rather than a measured amount of sweat.

Additionally applies: the German S1 guideline "Definition and Therapy of Primary Hyperhidrosis," AWMF registration number 013-059, July 2023 version, which lists botulinum toxin type A as an established treatment for primary palmar hyperhidrosis. Studies on the hand are small — that is a limitation of the evidence base, not an argument against the procedure, but it belongs in the disclosure discussion.

Hyperhidrosis Hands

Hyperhidrosis Hands

Two ways to anesthetize the hand

Does this sound familiar?

"I've avoided shaking hands for as long as I can remember"

"I tried the treatment once and stopped partway through"

"I'm worried I'll lose strength in my hand afterward"

Setting the right expectation

What is clarified first

Anesthesia is the core discipline here, not an add-on.

How your treatment works

Frequently asked questions

The treatment doesn't fail because of the active ingredient.

What the studies show

Further reading

Dr. med. Thomas Ackermann