Excessive sweating (hyperhidrosis) in Baghdad and Karbala: a stepwise treatment guide for a hot climate
Excessive sweating is a medical condition with a clear treatment ladder. Most patients get control without surgery, even in the Iraqi summer.
Hyperhidrosis means sweating far beyond what the body needs for temperature control. It affects an estimated one to three percent of people, usually starting in adolescence, and it has a documented impact on work, study, clothing choice and social confidence that is comparable to severe psoriasis [1]. In a climate where summer temperatures routinely exceed forty five degrees, patients are often told to simply tolerate it. That advice is wrong, because effective treatment exists at every step.
Key points
- Primary focal hyperhidrosis affects underarms, palms, soles or face, is symmetrical and stops during sleep
- Sweating that is one sided, starts at night or begins in adulthood needs investigation for an underlying cause
- Treatment is a ladder: topical, then iontophoresis or injections, then oral medication, then surgery
- Botulinum toxin is an approved, well studied treatment for severe underarm sweating; for palms and soles it is used off-label
- Untreated hyperhidrosis contributes to fungal infection, pitted keratolysis and eczema of the feet
Primary or secondary?
Primary focal hyperhidrosis is a disorder of the sympathetic nerve supply to eccrine sweat glands with no underlying disease. It is bilateral and roughly symmetrical, present for at least six months, often runs in families, usually starts before the age of twenty five and stops during sleep [1].
Secondary hyperhidrosis is generalised, may occur at night and points to a cause: thyroid overactivity, diabetes, infection including tuberculosis, lymphoma, menopause, anxiety disorders and many medicines. Any patient with those features needs blood tests and a medical review rather than an injection.
Step one: topical treatment
Aluminium chloride hexahydrate at ten to twenty percent, applied to completely dry skin at night and washed off in the morning, is the first step. Applying it to damp skin causes the irritation that makes most patients abandon it, so technique instruction matters more than the strength.
Topical glycopyrronium wipes are effective for axillary and facial sweating where available. Both approaches need consistent use, initially nightly, then twice weekly for maintenance.
Step two: iontophoresis and botulinum toxin
Iontophoresis passes a weak electrical current through water to treat palms and soles, initially several sessions a week, then maintenance. It is effective, drug free and can be continued at home with a personal device.
Botulinum toxin injection is an approved treatment for severe underarm sweating that topical antiperspirants have not controlled [2]. Small injections into the skin block the nerve signal to the sweat glands. In a trial of 145 patients, sweating in the treated underarm fell far more than in the underarm given placebo [3], and one treatment usually controls sweating for several months.
For the palms and soles botulinum toxin is used off-label, which means outside the product licence. Smaller studies support it for the palms [4][5], and the evidence for the soles is weaker [5]. The injections are painful, so a nerve block is often used for the palms, and temporary hand weakness is possible. We explain the benefits and these drawbacks before you decide.
- Underarms: botulinum toxin, an approved treatment, repeated when sweating returns
- Palms: iontophoresis first, then off-label injection with a nerve block if that is not enough
- Soles: iontophoresis, topical treatment and moisture management; injection is off-label, painful and less studied
- Face and scalp: careful low dose injection (off-label) or oral treatment
Step three: oral medication and surgery
Oral anticholinergics such as oxybutynin or glycopyrronium reduce sweating throughout the body and are useful in generalised or multi site disease. Dry mouth is the limiting side effect and dosing is titrated slowly. They are avoided in glaucoma and urinary retention.
Endoscopic thoracic sympathectomy is reserved for severe palmar hyperhidrosis that has failed everything else, because compensatory sweating elsewhere on the body occurs in a large proportion of patients and is permanent [1]. Local surgical options for the underarm, including curettage of sweat glands, are an alternative in selected cases.
Skin problems that follow untreated sweating
Constant moisture predisposes to tinea pedis and tinea cruris, pitted keratolysis with its characteristic odour, dyshidrotic eczema of the palms, folliculitis and contact dermatitis from footwear. Treating the sweating often clears skin problems that have resisted antifungal creams for years.
Practical measures matter: breathable cotton and natural fibres, moisture wicking socks, changing footwear daily to allow it to dry, and antiperspirant applied to feet as well as underarms.
Frequently asked questions
Does antiperspirant work if I sweat this much?
It usually does when applied correctly, which means to bone dry skin at bedtime, not in the morning after a shower. Most treatment failures are application failures.
Is botulinum toxin for sweating a cosmetic treatment?
No. It is a medical treatment for hyperhidrosis, approved for severe underarm sweating and used off-label for the palms and soles, at sites that have nothing to do with wrinkles.
Will treating my underarms make me sweat elsewhere?
Local treatments such as injections and topical agents do not cause compensatory sweating. That phenomenon is associated with surgical sympathectomy.
References
- [1] Nawrocki S, Cha J. The etiology, diagnosis and management of hyperhidrosis: a comprehensive review. Journal of the American Academy of Dermatology. Source
- [2] Allergan/AbbVie. BOTOX (onabotulinumtoxinA) Prescribing Information: chronic migraine and severe primary axillary hyperhidrosis indications. Source
- [3] Heckmann M, Ceballos-Baumann AO, Plewig G; Hyperhidrosis Study Group. Botulinum toxin A for axillary hyperhidrosis (excessive sweating). N Engl J Med. 2001;344(7):488-493. Source
- [4] Lowe NJ, Yamauchi PS, Lask GP, Patnaik R, Iyer S. Efficacy and safety of botulinum toxin type A in the treatment of palmar hyperhidrosis: a double-blind, randomized, placebo-controlled study. Dermatol Surg. 2002;28(9):822-827. Source
- [5] Weinberg T, Solish N, Murray C. Botulinum neurotoxin treatment of palmar and plantar hyperhidrosis. Dermatol Clin. 2014;32(4):505-515. Source
This content is general medical education and does not replace a personal consultation. Any prescription must be coordinated with your local doctor.
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