Hyperhidrosis: When Sweating Is More Than the Indian Heat

Hyperhidrosis is a medical condition where you sweat far more than your body needs to stay cool, most often on the palms, soles, underarms or face, and it happens even at rest, in an air conditioned room or in winter. It is common, it is not caused by poor hygiene, and it can usually be controlled with a stepwise plan that starts with strong antiperspirants and moves on to treatments such as iontophoresis, botulinum toxin injections or oral medicines if needed.

In India, heavy sweating is so normal in summer and monsoon that many people with hyperhidrosis are told it is just the weather. If you are changing shirts twice a day in December, avoiding handshakes, or smudging exam papers, it may be worth a closer look.

What is the difference between normal sweating and hyperhidrosis?

Sweating is how the body cools itself. In Indian heat and humidity, everyone sweats a lot. Hyperhidrosis is different:

Normal sweating	Hyperhidrosis
Triggered by heat, exercise, spicy food, fever or stress	Happens without these triggers, or far out of proportion to them
Improves in cool rooms and winter	Continues in air conditioning and cooler weather
Does not interfere much with daily life	Soaks hands, feet or clothes, affects work, studies and relationships
Usually all over the body	Often focused on palms, soles, underarms, face or groin

Doctors often suspect primary hyperhidrosis when focal sweating has gone on for six months or more, affects both sides of the body, starts before the age of 25, happens at least once a week, stops during sleep and runs in the family.

What are the types of hyperhidrosis?

Primary (focal) hyperhidrosis

• The most common type
• Affects the palms, soles, underarms, face or scalp
• Usually starts in childhood or adolescence
• Often runs in families
• Not caused by another illness or medicine

Secondary (generalised) hyperhidrosis

• Usually all over the body, sometimes with night sweats
• Often starts in adulthood
• Caused by another condition or medicine, such as an overactive thyroid, diabetes and low blood sugar, infections, menopause, obesity, some antidepressants and other drugs

Secondary hyperhidrosis needs the underlying cause to be found and treated, so it is important to tell your doctor about new or all over sweating, weight loss, fever or palpitations.

How does hyperhidrosis affect daily life?

People with hyperhidrosis often describe:

• Difficulty writing, typing, using phones and touchscreens
• Embarrassment while shaking hands, holding hands or at interviews
• Visible underarm sweat patches, clothing stains and the need to carry spare shirts
• Slippery feet in chappals and sandals, smelly shoes and frequent fungal infections
• Anxiety and avoidance of social situations

Skin problems that often come with it include athlete’s foot, sweat rash, pitted keratolysis (small craters on the soles with odour) and eczema of the hands. Our guide on prickly heat and monsoon skin care covers sweat related rashes, and our article on ringworm and tinea in India explains fungal infections that thrive in sweaty skin.

What can I do at home?

• Use an antiperspirant, not just a deodorant. Deodorants mask odour; antiperspirants reduce sweat. Products containing aluminium salts are widely available in India.
• Apply antiperspirant at night to completely dry skin, and wash off in the morning if advised. Sweat glands are less active at night, so the product works better.
• Wear loose, breathable fabrics such as cotton or linen, and darker or patterned clothes that show sweat less.
• Use sweat shields or undershirts to protect clothing.
• Choose leather or breathable shoes, alternate pairs daily, and wear moisture wicking or cotton socks, changing them during the day if needed.
• Use absorbent powders on the feet and in shoes.
• Note your triggers, such as caffeine, spicy food, alcohol or stress, which can make sweating worse.

What treatments might a dermatologist consider?

Treatment is usually stepwise, depending on which area is affected and how severe it is.

Prescription strength antiperspirants

Higher strength aluminium chloride preparations may be advised for underarms, palms and soles. They can cause stinging and irritation, so your doctor will explain how to use them safely.

Tap water iontophoresis

For sweaty palms and soles, hands or feet are placed in shallow trays of tap water while a mild electric current passes through. It is done several times a week at first, then less often for maintenance. Home devices are available, but it is best to start under medical guidance. It is not suitable for people with pacemakers, metal implants in the area or during pregnancy.

Botulinum toxin injections

Small injections of botulinum toxin into the affected skin temporarily block the nerve signals that switch on sweat glands. It is commonly used for underarms and can also be used for palms and soles. The effect usually lasts several months, after which it can be repeated. Injections in the palms can be painful and may cause temporary weakness of hand grip.

Oral medicines

Your dermatologist may consider tablets that reduce sweating across the body, particularly when several areas are affected. They can cause side effects such as a dry mouth, blurred vision, constipation or difficulty passing urine, and are not suitable for everyone. Do not take these on your own.

Energy based devices

Microwave or other heat based devices that target underarm sweat glands are available in some clinics. Availability and suitability vary.

Surgery

Endoscopic thoracic sympathectomy (ETS), which interrupts nerves that drive sweating in the hands, is reserved for severe cases where other treatments have failed. A frequent side effect is compensatory sweating, heavier sweating in other areas such as the back, chest or legs, which can be permanent and sometimes worse than the original problem. This needs a very careful discussion with a specialist.

Does hyperhidrosis affect children and teenagers?

Primary hyperhidrosis often starts in childhood and becomes more noticeable in the teenage years. Children may struggle with writing exams, holding pens or sports equipment. Treatment can start early with gentle measures. Iontophoresis and antiperspirants may be options, and your doctor will consider age before suggesting other treatments.

Is underarm odour the same as hyperhidrosis?

Not always. Body odour comes from bacteria breaking down sweat, especially from the apocrine glands in the underarms and groin. Some people have strong odour without excessive sweating. Daily washing, antiperspirants, changing clothes and sometimes treating bacteria on the skin can help. Hair removal in the underarms may reduce odour for some people; our laser hair reduction guide explains that option.

When to see a dermatologist

See a dermatologist if:

• Sweating soaks your hands, feet, underarms or clothes even when you are cool and at rest.
• It affects your work, studies, relationships or confidence.
• Over the counter antiperspirants have not helped.
• You have frequent foot infections, odour or rashes from constant moisture.

See a doctor promptly if sweating is new and all over the body, happens mainly at night, or comes with fever, weight loss, a fast heartbeat or other symptoms.

Hyperhidrosis is not something you have to just live with. Dr. Maria offers online consultations to understand your pattern of sweating and help plan the right next step for you.