Excessive sweating is one of the most common conditions nobody talks about. But people quietly build their lives around it: dark clothes only, jackets kept on in summer, avoided handshakes, ruined shirts.
And because it feels embarrassing rather than medical, many never learn the most useful fact about it: hyperhidrosis is a recognised condition, and it is genuinely treatable.
This guide explains what hyperhidrosis actually is - the honest ladder of treatments from cheapest to most involved. What the effective options cost in Ireland, and, because this is a treatment where it genuinely matters, who can legally provide them.
What hyperhidrosis actually is
Hyperhidrosis simply means sweating beyond what the body needs for temperature control. The most common form, primary focal hyperhidrosis, affects specific areas, most often the underarms, palms, feet, or face, usually starts in adolescence or early adulthood, and often runs in families. It is not caused by poor hygiene, anxiety, or anything you are doing wrong: the nerve signals telling certain sweat glands to work are simply overactive.
One important distinction before any treatment: sweating that begins suddenly in adulthood, happens all over the body, or occurs mainly at night can be secondary hyperhidrosis, meaning it is a symptom of something else, from medications to thyroid issues. That version needs a GP first, not a clinic. Any good practitioner will screen for this before treating you, which is one of the quiet ways a proper consultation protects you.
The treatment ladder, honestly
Hyperhidrosis treatment works best as a ladder: start cheap and simple, escalate only as needed.
Clinical-strength antiperspirants are the genuine first step, and they resolve milder cases more often than people expect. These are aluminium chloride formulations, available in pharmacies, applied to dry skin at night. They can irritate, but used correctly they are effective, cheap, and worth exhausting before anything else. A practitioner who starts you here rather than upselling you past it is showing you good judgement.
Iontophoresis, passing a mild electrical current through water to the hands or feet, has decent evidence for palm and foot sweating specifically, though it requires ongoing maintenance sessions and suits patient people.
Anti-wrinkle injections are the treatment that transforms the picture for moderate to severe focal sweating, and they are the reason hyperhidrosis appears on aesthetic clinic menus at all. The same botulinum toxin used to relax facial muscles also blocks the nerve signals that switch on sweat glands. Injected in a grid across the affected area, most commonly the underarms, it reduces sweating dramatically, with effects lasting roughly four to seven months, often towards the longer end for underarms. For many people it is close to life-changing: the first summer in years without planning around sweat.
Prescription oral medications and, in severe resistant cases, surgical options exist further up the ladder, but they sit firmly in specialist medical territory and come with meaningful trade-offs, so they are conversations for a doctor rather than options to shop for.
What it costs in Ireland
The main clinic-provided treatment, anti-wrinkle injections for underarm sweating, typically costs €500–€700 per treatment in Ireland. That is more than facial anti-wrinkle treatment, and the reason is honest: the areas are larger and the dose required is substantially higher.
At four to seven months of effect, that works out at roughly €85–€175 a month for a resolved problem, which is why people who have struggled for years rarely regret it, and also why it is worth confirming, via the antiperspirant step, that you need it at all. Our general anti-wrinkle injections cost guide explains how clinics price botulinum toxin treatments more broadly.
The legal point that actually matters here
Here is where hyperhidrosis differs from most treatments on a clinic menu. Because the effective injectable treatment is botulinum toxin, a prescription-only medicine, it can only lawfully be prescribed by a doctor or dentist and administered by a registered doctor, dentist, or nurse under their direction.
There is no legal grey area, unlike with dermal fillers, where anyone can inject.
That has a practical consequence: anyone offering injectable sweating treatment without those qualifications is not operating in a grey area, they are breaking the law, and anyone offering it suspiciously cheaply is worth questioning on exactly that basis. A legitimate provider will also insist on a proper consultation first, both to screen for secondary causes and because prescribing requires it. Our guide to medical vs non-medical practitioners explains the wider landscape.
The bottom line
If excessive sweating is shaping your daily decisions, you have more options than you probably realise, and the sensible path is the ladder: clinical antiperspirants first, iontophoresis for hands and feet, and injections when the simpler steps are not enough, provided by someone legally qualified to give them.
You can search register-verified clinics offering hyperhidrosis treatment near you, every one independently checked against the medical, dental, or nursing register, and if you are weighing up your options, our treatment quiz is a sensible place to start. Either way, this is a solved problem for most people who seek help, and that is a genuinely underreported piece of good news.
Medically reviewed by Dr Stephen Creedon. All SafeSkin editorial content is reviewed by a registered medical professional before publication.