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Excessive Sweating: Causes, Remedies and When to Worry
July 13, 2026
There are days when the sweat just won't stop. Under the armpits after only a light walk, on the palms when you have to shake hands, on the back as soon as you put on a shirt. If you recognise yourself, it isn't (necessarily) summer: you might have excessive sweating, a medical condition called hyperhidrosis that affects around 3% of the population and often has nothing to do with outside heat.
In this guide we distinguish true hyperhidrosis from simple summer sweat, clarify when excessive sweating is a symptom that deserves medical attention (menopause, thyroid, anxiety, certain drugs) and present natural remedies with clinical evidence — in particular sage officinalis, which in the Bommer 2011 study on 71 menopausal women reduced hot flushes by 64% in 8 weeks. The aim is to give you the tools to understand what's happening in your body and what you can do.
What is excessive sweating: primary and secondary hyperhidrosis
Sweating is a natural thermoregulation mechanism: sweat glands (2-4 million in the human body) release water and electrolytes onto the skin surface, which evaporate to dissipate heat. Sweating when it's hot, during exertion or emotion is physiological. It becomes excessive when it's disproportionate to the stimulus, interferes with daily life or appears in situations where it shouldn't.
Clinically two forms are distinguished:
Primary (essential) hyperhidrosis: excessive focal sweating (hands, feet, armpits, face), often symmetrical, starting at young age (adolescence or childhood), with probable genetic base (30-50% of cases have family history). It has no identifiable underlying medical cause.
Secondary hyperhidrosis: caused by an underlying condition (menopause, hyperthyroidism, diabetes, anxiety, drugs, infections). May be generalised (whole body) or localised. Often begins in adulthood and worsens over time.
Symptoms: how to tell if you sweat too much
Excessive sweating isn't just "sweating a lot in summer". It becomes clinically significant when it presents at least some of these criteria:
Visible sweating even without heat or exertion
Fully soaking t-shirts, shirts or bed sheets
Sweat drops running from hands, armpits, face, feet
Sweating that interferes with work or social life (shaking hands, holding papers, wearing light colours)
Daily or near-daily onset
Duration of more than 6 months
At least one episode per week
If you have 3 or more of these criteria, medical evaluation is recommended. For primary hyperhidrosis there are effective medical treatments; for secondary, treating the underlying cause is essential.
Causes of excessive sweating
Primary hyperhidrosis: when "the body is just like that"
About 80% of focal hyperhidrosis cases are primary: there's no underlying disease, but sweat glands respond disproportionately to normal stimuli (slightly warm temperature, emotions, spicy foods). Nerve fibres innervating these glands are thought to have a lower activation threshold. Typically affects palms, soles, armpits and face.
Secondary causes: when sweat is a symptom
The main causes of secondary hyperhidrosis include:
Menopause and perimenopause: oestrogen crash triggers hot flushes with sweating, typically nocturnal. Affects 60-80% of menopausal women
Hyperthyroidism: overactive thyroid accelerates metabolism and increases heat production. Generalised sweating often associated with tachycardia, weight loss, tremors
Anxiety and panic disorders: sympathetic activation causes acute palmar/plantar/axillary sweating
Diabetes: especially in hypoglycaemia, sudden onset sweating
Drugs: SSRIs (antidepressants), tamoxifen, corticosteroids, some NSAIDs, opioids
Infections: TB, endocarditis, HIV, granulomatous diseases — often with night sweating
Haematologic neoplasms: Hodgkin lymphoma (profuse night sweats), leukaemias
Nocturnal hypoglycaemia: in diabetics, sudden sweating during sleep
When to worry: red flags not to ignore
Some patterns of excessive sweating require urgent medical evaluation:
Night sweating that suddenly appears, soaking pyjamas and sheets, associated with unexplained weight loss and fever — suspicion of TB or lymphoma
Asymmetric sweating (only one side of the body) — possible neurological lesion
Sudden generalised sweating with chest pain — suspicion of heart attack
Sweating with tremors, tachycardia, weight loss, bulging eyes — suspicion of hyperthyroidism
Sweating with dizziness, confusion, tremors — suspicion of hypoglycaemia
Night sweating appearing for the first time after age 50 without menopause
Natural remedies for excessive sweating
Sage officinalis: the strongest evidence for hormonal sweating
Sage officinalis is the plant with the strongest clinical evidence for excessive sweating linked to hormonal imbalances. It contains compounds acting on hypothalamus thermoregulation centres and has documented anti-hidrotic effect. The Bommer 2011 study (PMID 21630133) on 71 menopausal women with sage officinalis 1 tablet/day for 8 weeks showed:
Hot flush reduction of 64% vs baseline
Improvement of night sweating in 85% of patients
Improvement of sleep quality
The De Leo 1998 study (PMID 9677811) with sage + medicago sativa made hot flushes disappear completely in 20 out of 30 women. Typical dose is 300-400 mg/day of standardised dry extract.
Magnesium bisglycinate: electrolyte replenishment and thermoregulation
Those who sweat a lot lose sodium, magnesium, potassium. Magnesium in particular is involved in regulating sympathetic nerve fibres that control sweat glands. Adequate magnesium levels can reduce sympathetic hyperactivity and improve sleep quality (indirectly reducing stress-related night sweating). Magnesium bisglycinate has the best bioavailability and lowest laxative effect.
Diet: foods to avoid
Some foods increase sweating by stimulating thermoregulation centres:
Caffeine: stimulates the sympathetic nervous system
Simple sugars: can cause reactive hypoglycaemia with sweating
Trans fats and fried foods: increase systemic inflammation
Anxiety and stress management
Many forms of excessive sweating are worsened by stress. Effective techniques are: diaphragmatic breathing (4 seconds in / 6 seconds out), mindfulness, regular physical activity (paradoxically reduces baseline sweating) and in selected cases cognitive behavioural therapy.
Sweating and hormones: menopause, thyroid, cortisol
Hormones are the most common cause of secondary excessive sweating. In particular:
Menopause: oestrogen decline destabilises hypothalamic thermoregulation centres. Sweating is typically nocturnal and associated with hot flushes. The Menopause Hot Flashes Relief Supplement with soy isoflavones and moringa is formulated for this type of sweating.
Hyperthyroidism: overactive thyroid increases basal metabolism and heat production. If accompanied by tachycardia, weight loss, anxiety — measure TSH and FT4. For thyroid function support in selenium deficiency, the Selenium + Moringa Supplement is useful.
Cortisol: chronic stress and elevated cortisol keep the sympathetic activated. Sympathetic hyperactivity facilitates emotional sweating. Stress management and magnesium are supportive.
Magnesium Bisglycinate: why it helps with excessive sweating
Regulation of the sympathetic nervous system, which controls sweat glands
Improvement of night sleep, reducing stress-related night sweating
The bisglycinate form has the highest bioavailability among magnesium salts (from 20-30% of oxide to 80% of bisglycinate) and doesn't cause laxative effect. Ideal for evening intake, dose 300-450 mg. Minimum cycles of 4 weeks to notice results on sleep; 8-12 weeks for a more structural benefit. The combination with vitamin D3 improves the calcium-magnesium balance and neuromuscular function, while vitamin B6 supports amino acid conversion and serotonin synthesis — another building block for restful sleep without stress-induced night sweats.
FAQ — Excessive sweating
Do I have hyperhidrosis or do I just sweat a lot?
The key difference is intensity and impact. If you sweat only when it's hot or during exertion, it's normal. If you sweat in situations where others don't (always damp hands, wet armpits even in cool room), if you need to change clothes often, if you avoid light clothing or handshakes — you probably have hyperhidrosis. A dermatologist can confirm with specific tests (starch test, gravimetry).
Deodorant or antiperspirant: what's the difference?
Deodorant only masks odour. Antiperspirant physically blocks sweat glands (through aluminium or zirconium salts). For excessive sweating you need an antiperspirant, preferably 15-25% aluminium chloride, applied in the evening before bed. It has solid clinical evidence (Tögel 2002, PMID 11978559).
Is night sweating always serious?
No, but it must always be evaluated if new, if it fully soaks the bed, if associated with weight loss, fever or pain. Night sweating can be physiological (too warm room, alcohol before bed, anxiety) or pathological (menopause, thyroid, TB, lymphoma). If it appears for the first time and persists for weeks, talk to your doctor.
What foods increase sweating?
Spicy foods (chilli, curry, wasabi), alcohol, coffee, strong tea, dark chocolate in large amounts, very fatty and ultra-processed foods. Capsaicin from chilli directly activates thermal receptors; alcohol is a vasodilator; caffeine stimulates the sympathetic.
Do I always need the doctor?
Not always. If sweating started recently, without red flags (weight loss, fever, pain) and basic remedies (antiperspirant, sage, magnesium, stress management) improve the picture, you can manage it yourself. Medical visit is needed if: new and progressive sweating, profuse night sweating, asymmetric, with other systemic symptoms, or if it seriously compromises quality of life.
Can excessive sweating be cured?
Yes. For primary hyperhidrosis there are graduated options: strong antiperspirants, iontophoresis, botulinum toxin (effective for 6-12 months), systemic anticholinergic drugs, and in selected cases thoracoscopic sympathectomy. For secondary, treating the cause (menopause, thyroid, anxiety) resolves or greatly reduces the symptom.
Magnesium Bisglycinate 450mg + D3 + B6
Replenishes salts lost with sweat, supports thermoregulation and improves night sleep: the form with maximum bioavailability.