What is excessive sweating?
Excessive sweating, medically termed hyperhidrosis, affects roughly 3% of people. Although sweating is a normal response to heat or strenuous activity, individuals with hyperhidrosis may perspire heavily without any obvious trigger, even in cool environments. Some sufferers can produce so much sweat that it soaks through their clothing. There are two main categories of excessive sweating: 1. Focal hyperhidrosis, Characterized by excessive perspiration in specific areas like the armpits, face, palms, or soles. This form typically appears symmetrically on both sides of the body and often begins shortly after waking. Night sweats are uncommon. 2. Generalised hyperhidrosis, Involves widespread sweating that can occur at night and affects the entire body. It is often secondary to another health issue or medication side effect.
Although heavy sweating can be distressing, various therapies are available to help control it.
Signs of excessive sweating
Occasional heavy sweating does not necessarily indicate hyperhidrosis. However, the following are common indicators of the condition:,
- Perspiring excessively for at least six months without an apparent cause
- Symmetrical sweating on both sides of the body
- Episodes of heavy sweating at least once per week
- Noticeable beads of sweat on the skin
- Clothing soaked through with sweat
- Sweating that disrupts daily activities, such as work or social interactions
- Difficulty holding objects (e.g. pens) or operating doorknobs due to slippery hands
- Skin remaining moist for prolonged periods, leading to soft, white, peeling areas
- Recurrent skin infections in sweaty regions, such as jock itch or athlete’s foot
What causes excessive sweating
Primary focal hyperhidrosis often has a genetic basis, with 30%, 50% of cases having a family history. In contrast, secondary generalised hyperhidrosis is usually the result of an underlying medical condition or a medication side effect. Conditions linked to this type include:
- Heart disease
- Stroke
- Cancer
- Hyperthyroidism (overactive thyroid)
- Menopause
- Lung disease
- Spinal cord injuries
- Adrenal gland disorders
- Parkinson’s disease
- Infections such as tuberculosis or HIV
Certain drugs may also trigger secondary generalised hyperhidrosis, including:
- Some antidepressants
- Medications for Parkinson’s disease or dementia
- Painkillers like opioids and non-steroidal anti-inflammatories (NSAIDs)
- Thyroid medications
- Diabetes treatments
- Systemic corticosteroids
How is excessive sweating diagnosed?
Diagnosis typically involves a physical exam and a discussion about your symptoms. A doctor may perform a Minor test, which includes: 1. Painting the skin with iodine (orange color) and allowing it to dry. 2. Sprinkling starch (white powder) over the iodine. 3. Observing areas where sweating turns the mixture blue.
Additionally, blood and urine tests, among other assessments tailored to suspected causes, are often conducted to identify any underlying conditions.
How is excessive sweating treated?
Treatment depends on the type of hyperhidrosis. If another medical issue is responsible, that condition is treated first. When no clear cause is found, efforts focus on reducing sweating. A combination of options may be recommended, such as:,
- Over-the-counter antiperspirants
- Prescription medications that block nerve signals responsible for sweating
- Botulinum toxin injections to temporarily inhibit sweat glands (effects last 6–12 months)
- Surgical options like sympathectomy, where specific nerves controlling sweating are cut, destroyed, or clamped, though this can lead to compensatory sweating in other areas
Complications of excessive sweating
The primary challenge of hyperhidrosis is its social and emotional impact, potentially causing embarrassment, reduced self-esteem, and interference with daily life. Individuals with excessive perspiration are also at greater risk for skin infections in areas that remain constantly damp.
What else can you do?
Several lifestyle adjustments can help mitigate symptoms:,
- Wear loose-fitting clothing made from natural fibers that wick moisture and resist stains
- Use armpit shields or pads in shirts to protect garments
- Change clothing and shoes promptly when they become damp
- Opt for shoes and socks composed of breathable materials, and use absorbent insoles, replacing them often
- Allow feet to air out as much as possible
- Bathe daily to remove bacteria from the skin
- Apply absorbent powder to clean, dry skin after showering
- Limit consumption of caffeine -containing foods and beverages
- Consult your doctor about discontinuing any medication that may contribute to hyperhidrosis
When should you see your doctor?
Seek medical advice if you experience signs of excessive sweating, since effective treatments exist. Consult a physician urgently if sweating is accompanied by:
- Unexplained weight loss
- Night sweats
- Fever, chest pain, shortness of breath, or a rapid heartbeat
- Prolonged, unexplained episodes of heavy sweating
Taking these steps can help identify and manage the root cause, ensuring appropriate care and relief.