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Welcome back, DERM Community.
Last issue we were on seborrheic keratosis, a diagnosis that usually arrives because the patient noticed something and pointed at it.
Hyperhidrosis works the opposite way. These patients have often spent years making sure nobody notices, and that includes you.
Roughly 4.8% of the US population meets criteria for hyperhidrosis, about 15.3 million people. Of those, 70% describe their sweating as severe in at least one body area. Only 51% have ever mentioned it to a healthcare professional. The two reasons they give most often: they do not think it is a medical condition, and they do not think anything can be done about it.
In one dermatology cohort of 387 patients with primary hyperhidrosis, the mean delay between symptom onset and presentation was 8.9 years.
That gap is not a dermatology problem. It sits in primary care, where these patients are already sitting in your exam room for something else.
Five places it goes wrong:
1. Waiting for the patient to raise it. Hyperhidrosis rarely appears on an intake form. Patients have built years of workarounds and normalized the condition into a personality trait. Onset clusters in adolescence and young adulthood, the group least likely to volunteer it. Ask one screening question during skin, acne, anxiety, or adolescent visits, then follow with duration, location, nocturnal presence, and family history.
2. Skipping the primary versus secondary split. Treating the sweating symptomatically without asking why it is there. Primary focal disease means six or more months of focal, visible, unexplained sweating plus two or more of: bilateral and symmetric, impairs daily activities, weekly episodes, onset before 25, family history, stops during sleep. Secondary disease skews older, generalized or asymmetric, and continues at night. Review the medication list before ordering labs, since drugs are the most commonly missed cause.
3. Antiperspirant advice that guarantees failure. Telling patients to use a clinical strength product without telling them how. Aluminum salts need six to eight hours of contact with dry skin, so the product goes on at night and comes off in the morning. Confirm they are using an antiperspirant and not a deodorant, manage irritation instead of letting them quit, and expect the palms to respond less well than the axillae.
4. Stopping the ladder at aluminum chloride. Two FDA approved topicals exist for axillary disease, glycopyrronium cloth and sofpironium gel, both from age nine. Below them sit oral anticholinergics (all off-label), iontophoresis for palms and soles, botulinum toxin, energy based devices, and surgery. Document an HDSS score at the first visit, because payers usually require a 3 or 4 plus documented topical failure.
5. Treating the sweat and missing the infections and the mood. Primary hyperhidrosis carries roughly three times the odds of any cutaneous infection and five times the odds of fungal infection, so recurrent tinea that keeps returning after adequate treatment warrants a sweating history. Anxiety and depression run two to three times higher than in patients without it and rise with severity, though the causal direction is unsettled.
The practical reset
Add one sweating screening question to adolescent, acne, and anxiety visits
Ask the four discriminators: duration, location, nocturnal presence, family history
Review the medication list before ordering any labs
Order targeted labs only when the history points to a secondary cause
Teach antiperspirant technique out loud: dry skin, at night, wash off in the morning, judge at two weeks
Confirm the patient is using an antiperspirant and not a deodorant, and point them to the active ingredient panel
Manage irritation instead of letting the patient abandon therapy
Know the two FDA approved topicals by name and age indication
Document an HDSS score at the first visit
Screen for tinea, pitted keratolysis, and maceration at the affected sites
For plantar disease, cover socks and footwear rotation alongside the prescription
Quote the compensatory sweating numbers before making a surgical referral
Ask about mood, and treat it as part of the condition rather than a side note
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👋🏻 Thank you for being here, DERM community!
Hyperhidrosis carries a reputation as a cosmetic complaint, and that reputation is exactly why it sits in your exam room for nine years without being named. Patients are not staying quiet because the condition is minor. They are staying quiet because nobody has ever told them it is medical.
Ask before they volunteer it, check the medication list before the labs, and teach the antiperspirant out loud instead of assuming they know how to use it.
See you next week, Derm community!
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DERM Community | Derm for Primary Care Team
