Derm Cases · Dermatology / Primary Care / Autonomic
OSCE — disabling axillary and palmar sweating: primary vs secondary hyperhidrosis ladder
An 8-minute OSCE on primary focal vs secondary generalised hyperhidrosis, aluminium chloride, iontophoresis, botulinum toxin, anticholinergics, and ETS compensatory sweating counselling.
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Target exams
NEET-PGINICETUSMLEPLABMRCP
Prompt
An 8-minute OSCE on primary focal vs secondary generalised hyperhidrosis, aluminium chloride, iontophoresis, botulinum toxin, anticholinergics, and ETS compensatory sweating counselling.
Brief (to candidate)
A 19-year-old has lifelong bilateral axillary and palmar sweating that stops during sleep and ruins interviews. A 55-year-old reports new night sweats with weight loss. You have 8 minutes to separate primary from secondary hyperhidrosis and deliver a site-based treatment ladder including ETS risks.
Candidate instructions
- Define primary focal vs secondary generalised hyperhidrosis criteria.
- List secondary causes needing investigation.
- Prescribe aluminium chloride 20% and iontophoresis appropriately by site.
- State role of botulinum toxin A and oral anticholinergics.
- Counsel ETS last-line compensatory hyperhidrosis risk.
Examiner checklist (mark each domain / 10)
| Domain | Key actions expected |
|---|---|
| Primary focal criteria | Bilateral symmetric focal (axilla/palm/sole/craniofacial), onset typically <25 years, ceases in sleep, ≥1 episode/week, impairs daily life, often family history; diagnosis of exclusion of secondary causes when atypical[6][4] |
| Secondary red flags | New generalised sweating, night sweats, fever, weight loss → lymphoma/TB/hyperthyroid work-up; episodic with HTN/palpitations → phaeochromocytoma metanephrines; drugs, menopause, Parkinson disease, infection |
| Pharmacology basis | Eccrine glands: sympathetic cholinergic (ACh on M3) — explains anticholinergics and botulinum efficacy |
| First-line topical | Aluminium chloride hexahydrate 20% to dry axillae at night; wash in morning; reduce strength if irritant dermatitis[2][3] |
| Site ladder | Palmoplantar: tap-water iontophoresis; refractory axillary/palmar: intradermal botulinum toxin A; generalised/multifocal: oral anticholinergics (e.g. oxybutynin/glycopyrrolate) with anticholinergic side-effect counselling; miraDry/devices selected cases |
| ETS last line | Endoscopic thoracic sympathectomy only after failure of lesser measures; compensatory hyperhidrosis common and may be worse than original disease — mandatory detailed consent |
| Impact | Acknowledge major psychosocial/occupational disability; starch-iodine optional mapping before toxin |
Model key actions
- Confirm primary focal features or investigate secondary generalised disease.[6]
- Start AlCl3 20% (axilla) or iontophoresis (hands/feet); escalate to BoNT-A.[2]
- Reserve ETS as last resort after counselling compensatory sweating.
Common errors
- Jumping to ETS without medical ladder.[6]
- Missing secondary causes in new adult generalised sweating.
- No irritancy counselling for aluminium chloride.
- Ignoring anticholinergic contraindications (glaucoma, urinary retention, cognitive risk).
References5ShowHide
- [2]Nawrocki S, Cha J The etiology, diagnosis, and management of hyperhidrosis: A comprehensive review: Etiology and clinical work-up. J Am Acad Dermatol, 2019.PMID 30710604
- [3]McConaghy JR, Fosselman D. Hyperhidrosis: Management Options. Am Fam Physician, 2018.PMID 30215934
- [4]Nawrocki S, Cha J. The etiology, diagnosis, and management of hyperhidrosis: A comprehensive review. Part I. J Am Acad Dermatol, 2019.PMID 30710603
- [5]Strutton DR, et al. US prevalence of hyperhidrosis and impact on individuals with axillary hyperhidrosis. J Am Acad Dermatol, 2004.PMID 15280843
- [6]Solish N, Bertucci V, Dansereau A, et al. A comprehensive approach to the recognition, diagnosis, and severity-based treatment of focal hyperhidrosis: recommendations of the Canadian Hyperhidrosis Advisory Committee. J Am Acad Dermatol, 2007.PMID 17661933