Hyperhidrosis in Singapore: Excessive Sweating and Treatment Options

Primary focal vs secondary hyperhidrosis

Feature	Primary focal hyperhidrosis	Secondary hyperhidrosis
Pattern	Commonly affects particular areas, such as both underarms, the palms or the soles	May be widespread or localised, depending on the cause1,10
History	Often begins earlier in life and may run in families	May follow a new medical condition or medicine2,4
During sleep	Typically reduces or stops during sleep	Night sweating can occur and is interpreted alongside other symptoms10
Assessment priority	Site, severity, daily impact and previous care	Identifying and addressing the underlying contributor where possible1,3

These patterns are clinical guides, not a checklist for self-diagnosis³. New, generalised or unexplained night sweating needs medical assessment, particularly with fever, weight loss or other changes in health¹.

Is sweating in Singapore’s heat the same as hyperhidrosis?

Sweating during heat or exercise is part of normal temperature regulation⁴. Hyperhidrosis can cause persistent dampness even in cooler conditions, so its pattern and daily impact matter^2,5.

Heat, emotional stress and certain foods or drinks can make sweating more noticeable, and triggers differ between people⁵. A brief record of when heavy sweating happens can show whether there is a consistent trigger.

How is hyperhidrosis assessed?

The consultation covers the affected areas, age at onset, family history, whether sweating occurs during sleep, and current medicines^3,6. Blood tests or other investigations are chosen according to the history and examination; they are not required for everyone¹⁰.

Doctors may use the four-point Hyperhidrosis Disease Severity Scale (HDSS), which rates how tolerable the sweating is and how often it disrupts daily activities³. It gives a way to track progress against your own priorities, such as handling paper comfortably or needing fewer clothing changes.

Persistent wetness can also contribute to skin irritation and infection, so rashes, soreness or broken skin should be examined¹. Our skin allergy guide covers product-related rashes.

Hyperhidrosis treatment in Singapore: the options

Treatment depends on the site, severity, cause and how well previous measures were tolerated^3,6. Some options require referral, and suitability and local availability are confirmed at assessment.

Approach	Where it may fit	Main consideration
Antiperspirants	First-line care for underarm sweating, sweaty hands and sweaty feet	Reduce sweat output; irritation can limit use4,5
Prescription topical treatment	Selected localised sweating, particularly the underarms	Formulation, application area and side effects need review1,6
Iontophoresis	A common option for sweaty palms and soles	Usually needs an initial course and maintenance7,8
Botulinum toxin	Selected persistent focal sweating after assessment	Temporary effect, injection discomfort and site-specific risks2,9
Oral medication	Selected cases, including several affected areas	Whole-body effects and reduced heat tolerance2,6
Sweat gland procedures or surgery	Selected persistent symptoms after less invasive options	Recovery, irreversible effects, and compensatory sweating with sympathectomy1,6

Antiperspirant vs deodorant for excessive sweating

Antiperspirants reduce sweat output; deodorants mainly address odour⁵. A product may do both, so check the label rather than assuming any deodorant will control wetness⁵.

Aluminium salt antiperspirants are commonly used, and applying them to dry skin helps reduce irritation^2,5. Many are applied before bed; frequency and application area follow the product instructions or the plan agreed with your clinician^4,5.

Continued burning or a rash means the formulation and how it is used should be reviewed⁴. Applying it more often is not necessarily the next step.

Prescription creams, gels or wipes

Some prescription topical medicines reduce the signals that stimulate sweat glands¹. They differ from ordinary antiperspirants and may be considered for selected areas when first-line care is not enough^1,6.

They can still cause irritation and other side effects, and accidental transfer to the eyes can cause visual symptoms⁶. Suitability, local availability and the instructions for the specific preparation are checked before use.

Sweaty palms, sweaty hands and sweaty feet: iontophoresis

Iontophoresis passes a controlled electrical current through water in contact with the skin^7,8. A randomised, sham-controlled trial found improvement in palmar sweating compared with sham treatment⁷.

The effect usually needs maintenance rather than a single permanent course⁸. Tingling or irritation can occur. Pregnancy, implanted electronic devices or relevant metal implants are discussed before treatment⁸.

Botulinum toxin for underarm sweating

Botulinum toxin temporarily reduces nerve signalling to the sweat glands in the treated area¹⁰. A 2025 meta-analysis found reduced sweat production compared with placebo in primary underarm hyperhidrosis, with no statistically significant advantage over the other treatments pooled in that analysis⁹.

This supports its use in selected patients rather than ranking it above other treatments⁹. Evidence for the underarms is separate from the considerations for the palms, soles or face^2,9.

Injections can be uncomfortable, and treating the palms can cause temporary weakness in the hand muscles². The effect lasts months rather than removing the tendency to sweat, so the response is reviewed before further treatment⁴. Our botulinum toxin guide covers how the treatment works.

Oral medicines for hyperhidrosis

Oral anticholinergic medicines reduce sweat-gland stimulation throughout the body. They may be considered when several areas are affected or local measures are not enough⁶. Dry mouth, constipation, blurred vision and difficulty passing urine can limit their use².

Reduced sweating can impair the body’s ability to cool itself in hot conditions⁶. Outdoor work, exercise and relevant medical conditions are discussed before treatment; doses are not adjusted independently.

Sweat gland procedures and surgery

Some procedures reduce or remove underarm sweat glands, while sympathectomy interrupts part of the nerve supply involved in sweating¹⁰. They work differently and are discussed separately, including the possibility of persistent discomfort, nerve injury or scarring with particular procedures^1,10.

Sympathectomy is generally reserved for carefully selected patients with substantial symptoms despite other care². Compensatory sweating, meaning increased sweating elsewhere, is an important potential consequence and is part of the decision before surgery¹⁰.

Why the treatment area and your routine matter

Underarm sweating, sweaty hands and sweaty feet affect different activities, and a treatment that suits one site may be less practical for another³. For the hands, keeping grip and fine movement comfortable is a key consideration².

Tell us whether the main difficulty is writing, using equipment, footwear or clothing. The plan accounts for that priority along with skin sensitivity, recovery and the time needed for maintenance.

Everyday care for excessive sweating

Breathable clothing, changing damp socks and letting footwear dry help with comfort⁵. A record of foods, drinks or situations linked to heavier sweating can identify personal triggers⁵.

These steps support daily care; they do not replace assessment of persistent or unexplained symptoms⁵.