Quick answer. Hyperhidrosis is excessive sweating beyond what the body needs to cool itself, common in Singapore’s hot, humid climate. Primary hyperhidrosis is focal and symmetric (usually palms, soles, armpits or face) with no underlying disease, while secondary hyperhidrosis is caused by another condition or medication and needs medical work-up. A typical Singapore treatment ladder starts with aluminium chloride antiperspirants, then iontophoresis for hands and feet, botulinum toxin injections for the armpits or palms, and oral anticholinergic tablets. Endoscopic thoracic sympathectomy (ETS) surgery is a last resort because it commonly causes compensatory sweating elsewhere. See a doctor to confirm the type. Botulinum toxin and surgery costs vary widely by clinic and are often not MediSave-claimable.
Hyperhidrosis means sweating far more than the body needs for temperature control. It commonly affects the palms, soles, armpits or face, and can be socially and professionally distressing. Singapore’s hot, humid, year-round climate can make the problem feel even more pronounced.
This guide explains the difference between primary and secondary hyperhidrosis, walks through the treatment ladder available in Singapore from antiperspirants to surgery, and is honest about the trade-offs, particularly the compensatory sweating that can follow ETS surgery.
At a glance
| Treatment | Best suited for | Key points |
|---|---|---|
| Aluminium chloride antiperspirant | Mild to moderate, armpits/palms/soles | First-line; apply to dry skin at night; can irritate |
| Iontophoresis | Hands and feet | Mild electric current through water; sessions then maintenance |
| Botulinum toxin injections | Armpits, palms | Blocks sweat-gland nerve signals; lasts several months; repeat needed |
| Oral anticholinergics | Widespread or resistant cases | Tablets; side effects like dry mouth, blurred vision |
| Endoscopic thoracic sympathectomy (ETS) | Severe palmar cases, last resort | Surgery; high risk of compensatory sweating elsewhere |
Primary versus secondary hyperhidrosis
Identifying the type guides treatment:
- Primary (focal) hyperhidrosis: excessive, fairly symmetric sweating of specific areas, the palms, soles, armpits or face, with no underlying illness. It often starts in childhood or adolescence, tends to stop during sleep, and can run in families.
- Secondary hyperhidrosis: sweating caused by an underlying condition or medication, such as thyroid overactivity, diabetes, infections, menopause or certain drugs. It may be more generalised, can start later in life and may continue at night.
Generalised, night-time or new-onset sweating in an adult should be checked by a doctor to rule out an underlying cause before focal treatments are used.
Antiperspirants: the first step
Clinical-strength aluminium chloride antiperspirants are usually the first-line treatment for mild to moderate hyperhidrosis of the armpits, palms and soles.
- They work by plugging the sweat ducts, reducing how much sweat reaches the surface.
- Apply to clean, fully dry skin at night for best effect, then wash off in the morning.
- Skin irritation is the most common limitation; reducing frequency or using a barrier can help.
Iontophoresis for hands and feet
Iontophoresis is a well-established option for sweaty palms and soles. The hands or feet are placed in shallow trays of water while a mild electrical current passes through to temporarily reduce sweat-gland activity.
- It usually starts with several sessions a week, then drops to maintenance sessions once sweating improves.
- It is non-invasive and can be done with a home device after training.
- It needs ongoing use, as benefits fade without maintenance.
Botulinum toxin and oral medication
For more troublesome sweating, especially the armpits and palms:
- Botulinum toxin injections block the nerve signals that switch on sweat glands. They are effective for axillary (armpit) and palmar (palm) sweating, with results typically lasting several months before repeat treatment is needed. Palmar injections can be uncomfortable and may temporarily affect grip strength.
- Oral anticholinergic tablets (such as glycopyrrolate or oxybutynin) reduce sweating more broadly but can cause side effects like dry mouth, blurred vision and constipation, so they need medical supervision.
Surgery (ETS): last resort and its trade-off
Endoscopic thoracic sympathectomy (ETS) is a surgical option, mainly for severe palmar hyperhidrosis that has not responded to other treatments. The nerves driving sweating are interrupted, which can dramatically reduce hand sweating.
- It is a last resort. The major drawback is compensatory sweating, where the body sweats more elsewhere (such as the back, chest or abdomen). This is common and can be permanent and sometimes worse than the original problem.
- Because it is irreversible, ETS is only considered after antiperspirants, iontophoresis, botulinum toxin and oral medication have been tried, and the risks fully discussed.
Costs, climate and when to see a doctor
Singapore’s heat and humidity can make hyperhidrosis feel constant, but the condition is treatable in steps and you do not have to start with surgery.
- Costs vary by clinic. Antiperspirants and iontophoresis are relatively affordable; botulinum toxin is priced per treatment and typically runs into the hundreds of dollars per area, repeated every few months; surgery is the most costly. Treatment for cosmetic or quality-of-life reasons is often not MediSave-claimable, so check with your clinic.
See a doctor or dermatologist if sweating disrupts daily life, if it is generalised, new in adulthood or happens at night (to exclude an underlying cause), or before considering injections or surgery.
How to prepare for your appointment
Before seeing a doctor or dermatologist, it helps to note where you sweat, when it started, whether it stops during sleep, and how it affects daily activities such as work, writing or handling documents. Bring a list of your current medicines and any supplements, as some drugs can cause sweating. If you suspect an underlying cause, mention any other symptoms such as weight change, palpitations, fever or night sweats, which the doctor will want to assess.
Self-management at home
- Apply clinical-strength antiperspirant to clean, fully dry skin at night, then wash off in the morning.
- Wear loose, breathable cotton or moisture-wicking fabrics, and keep spare clothing handy in Singapore’s humidity.
- Use absorbent insoles and breathable footwear for sweaty feet, and change socks during the day.
- Identify triggers such as caffeine, spicy food or stress, and manage them where you can.
Questions to ask your doctor
- Is my sweating likely to be primary, or could it have an underlying cause worth testing for?
- Which treatments on the ladder suit my pattern of sweating, and in what order?
- How long will each treatment last, and how often will I need to repeat it?
- What are the realistic risks of injections or surgery in my case?
Common questions
Will losing weight or changing diet cure hyperhidrosis?
For primary hyperhidrosis, lifestyle changes may ease symptoms a little but rarely resolve them. They are still worthwhile alongside medical treatment.
Is treatment covered by MediSave or subsidies?
Treatment for cosmetic or quality-of-life reasons is often not claimable. Ask your clinic about costs and any coverage before you start.
Related guides
- Best Dermatology Clinics in Singapore — our editorial shortlist
- dermatology clinics directory
- Melasma treatment
- Viral warts treatment
- Keloid scar treatment
Sources
- National Skin Centre (NHG Health) overview
- HealthHub Singapore – Diseases and Conditions
- Cleveland Clinic – Hyperhidrosis: Types, Causes, Symptoms & Treatment
- AAFP – Hyperhidrosis: Management Options
Part of our Skin health guides · Browse all health topics