There are foot problems people talk about freely, and there are foot problems people quietly Google at midnight hoping nobody notices. Sweaty feet firmly belongs in the second category — which is a shame, because it’s extremely common, very manageable, and nothing to be embarrassed about.
Feet have more sweat glands per square centimetre than almost anywhere else on the body. In warm weather, in enclosed shoes, after a long day on your feet — sweating is entirely normal. The problems start when it becomes excessive, persistent, or starts causing secondary issues like odour, skin breakdown, or fungal infections.
Here’s what’s actually going on, and what you can do about it.
What Causes Sweaty Feet?
The medical term for excessively sweaty feet is plantar hyperhidrosis — hyperhidrosis being the clinical name for overactive sweat glands. It can affect the feet alone, or occur alongside sweating in the hands, underarms, or face.
Common triggers and causes include:
- Warm weather and physical activity — the most obvious, and the most universal
- Synthetic footwear and socks — materials that don’t breathe trap heat and moisture, creating exactly the conditions sweat glands respond to
- Stress and anxiety — the feet have a high concentration of eccrine sweat glands, which are activated by both temperature and emotional stress
- Hormonal changes — puberty, pregnancy, and the menopause can all increase sweating generally, including in the feet
- Hyperhidrosis — in some people, the sweating is disproportionate to any trigger and is a condition in its own right, often running in families
- Certain medications — some antidepressants, blood pressure medications, and other drugs list increased sweating as a side effect
If your feet have always sweated heavily with no obvious trigger, and particularly if other areas of your body are affected too, it’s worth mentioning to a GP — hyperhidrosis is treatable and you don’t have to just live with it.
Why Do Sweaty Feet Smell?
Sweat itself is largely odourless. The smell associated with sweaty feet comes from bacteria — specifically, bacteria that live naturally on the skin and break down sweat as it sits in the warm, enclosed environment of a shoe. The byproduct of that process is what you can smell.
A particularly pungent version of this involves a condition called pitted keratolysis — a bacterial skin infection that causes small pits or craters in the soles of the feet and a noticeably strong, unpleasant odour. It looks like small holes in the skin of the heel or ball of the foot and is more common than most people realise. It responds well to treatment but won’t resolve on its own, so if the description sounds familiar it’s worth getting it looked at. Find a podiatrist near you.
How to Treat Sweaty Feet
Wash and Dry Thoroughly — Every Day
It sounds basic, but the single most effective thing you can do is wash your feet properly — not just let soapy shower water run over them — and dry between every toe carefully afterwards. Moisture sitting between the toes is the root cause of most secondary problems: odour, fungal infections, and skin breakdown.
Use a mild antibacterial soap if odour is a concern. Dry with a dedicated towel rather than the one you use for the rest of your body, and make sure between the toes is genuinely dry before putting socks on.
Antiperspirant — on Your Feet
This surprises a lot of people, but antiperspirant works on feet for the same reason it works on underarms — it temporarily blocks the sweat ducts. A standard roll-on or spray antiperspirant applied to clean, dry feet before bed can make a meaningful difference. Let it dry fully before putting socks on.
For more significant sweating, there are stronger clinical-strength antiperspirants available — look for products containing aluminium chloride at higher concentrations than standard deodorants.
Foot Powders and Sprays
Antifungal or deodorising foot powders serve a dual purpose: they absorb moisture and reduce the bacterial and fungal activity that causes odour. Applying powder inside shoes as well as to the feet is more effective than treating the feet alone.
Socks — Material Matters
Cotton socks are better than synthetic, but wool — particularly merino wool — is the best natural choice for keeping feet dry. Merino is moisture-wicking, temperature-regulating, and naturally antimicrobial. It sounds counterintuitive for summer, but thin merino socks are cooler and drier than cotton in warm weather.
Avoid nylon and polyester where possible — they trap heat and moisture and make everything worse.
Footwear Choices
Shoes made from natural materials — leather, canvas, suede — breathe far better than synthetic uppers. In summer, sandals and open footwear are the obvious solution, but if closed shoes are necessary, leather is significantly better than plastic-based materials.
Rotating shoes matters more than people realise — wearing the same pair every day doesn’t give them time to dry out fully between wears, which means you’re stepping into a damp shoe from the previous day. Even alternating between two pairs makes a noticeable difference.
Preventing Fungal Infections
Excessive foot sweating significantly increases the risk of athlete’s foot and fungal nail infections — the warm, damp environment is exactly what fungi need to thrive. If you’re prone to sweaty feet, keeping on top of antifungal prevention is worth the effort.
- Use antifungal powder in shoes regularly, especially during warm weather
- Wear flip-flops in communal changing rooms and pool areas
- Change socks at least once a day, more often if you’ve been particularly active
- Address any athlete’s foot promptly — left untreated, it can spread to the nails. Read our guide to athlete’s foot treatment.
- Similarly, any signs of fungal nail changes are worth treating early. Read our guide to fungal nail treatment.
When to See a Podiatrist or GP
Most sweaty feet respond well to the practical measures above. But there are situations where professional input is worthwhile:
- Sweating is excessive, persistent, and affecting your quality of life or confidence
- You suspect pitted keratolysis — the distinctive pitted appearance and strong odour
- You have recurrent fungal infections despite treatment and prevention
- There’s skin breakdown, cracking, or signs of infection between the toes or on the soles
- Sweating is accompanied by other symptoms that might suggest an underlying condition
A podiatrist can assess the skin health of your feet, rule out fungal or bacterial infection, and recommend prescription-strength treatments if over-the-counter options haven’t been sufficient. Find a podiatrist near you.
Frequently Asked Questions
Is it normal for feet to sweat a lot in summer?
Yes — feet have a high density of sweat glands and will naturally sweat more in warm weather and with physical activity. It only becomes a clinical concern when it’s disproportionate, persistent regardless of temperature, or causing secondary problems.
Can diet affect foot sweating?
Some evidence suggests that spicy food, caffeine, and alcohol can trigger or worsen sweating generally. Staying well hydrated and maintaining a balanced diet supports overall skin health, but diet is unlikely to be the primary factor for most people.
Will my feet stop sweating if I wear open shoes all summer?
Open footwear significantly reduces moisture build-up, but sweating itself won’t stop — the sweat just evaporates more quickly, which is why feet in sandals smell less than feet in trainers.
Is hyperhidrosis covered on the NHS?
Yes. If sweating is significantly affecting your daily life, a GP can refer you for treatment — which may include prescription-strength antiperspirant, iontophoresis (a device that uses electrical current to reduce sweating), or in severe cases Botox injections to the feet.
Can children get hyperhidrosis?
Yes, and it often starts in childhood or adolescence. If a child’s feet are consistently wet through socks or causing skin problems, it’s worth raising with a GP.
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The information on this page is for general guidance only and does not constitute medical advice. If you are unsure about your symptoms, please consult a qualified podiatrist or GP.
