Sweaty Feet

Authored by , Reviewed by Dr Helen Huins on | Certified by The Information Standard

Many people experience sweaty feet occasionally. However, for some people excessive foot sweating is a persisting problem which can be both difficult to manage and embarrassing. It may lead to smelly feet, and nobody likes stinky feet. This leaflet explains why feet sweat (which is normal) and how to stop your feet from being sweaty or smelly.

Sweat doesn't smell bad when it's produced. However, if sweat remains on skin (such as when it can't evaporate in warm conditions - for example, when trainers with non-'breathable' linings are worn), skin germs (bacteria) break down the sweat. This produces the characteristic smell of sweaty feet. We probably all remember this smell from school changing rooms.

Sweating is normal, but nobody wants stinky feet. Sweat is more likely to become smelly if:

  • You are on your feet all day, particularly in a warm environment.
  • You are under a lot of stress.
  • Your shoes are tight so sweat can't evaporate.
  • Your shoes are made of material that doesn't allow sweat evaporation.
  • Poor hygiene can play a part too - for example, washing your feet infrequently or not changing socks can allow bacteria to thrive.

Fortunately there are lots of remedies and strategies which can help to stop you having smelly sweaty feet.

Foot care strategies

  • Wash feet daily with soap and water and dry thoroughly - especially dry carefully between the toes where skin can easily become soggy and germs (bacteria) can breed. Make sure your feet are dry before putting socks and shoes on.
  • Keep toenails short and clean.
  • Remove hard skin from the soles of your feet - it can become soggy when damp, becoming a place for germs to grow.

The best socks for smelly feet

  • Wear fresh socks every day. Change them more than once a day if necessary, particularly if you have done some form of exercise which made you sweat, or walked a long way.
  • Wear absorbent socks made of natural fibre, or socks designed to absorb moisture. Socks made of wool, cotton or a mixture of these are thought to be the best socks if you have sweaty feet.
  • Avoid nylon socks.
  • 'Sports socks' are often designed to absorb sweat.

The best shoes for smelly feet

  • Avoid shoes made of synthetic material.
  • Avoid tight-fitting shoes - aim for shoes which allow air to circulate, including sandals and open-toed shoes.
  • Alternate your shoes daily to allow them to dry thoroughly. Airing or alternating insoles can help.

Foot products which might help smelly or sweaty feet

  • Antiperspirant reduces sweating by mechanically blocking the sweat ducts. Antiperspirant consists mainly of various aluminium salts dissolved in alcohol and mixed with essential oils. Antiperspirants can be used on your feet. Strong antiperspirants for excessive sweating (hyperhidrosis) containing aluminium chloride are available over the counter. These come as a roll-on solution, spray or dusting powder. They are used once a day until the problem improves (usually for about a week), then as needed.
  • Consider using an antifungal foot spray or powder at night.
  • Consider using medicated insoles, which act as deodorant.
  • Consider using an antibacterial soap for your feet, available from pharmacies. (For example, Hibiscrub®.)

Other treatments

For those with excessive sweating (hyperhidrosis), a treatment called iontophoresis is occasionally used. This is a treatment that uses electrical stimulation. This is normally a procedure done in a specialist clinic, but home treatment kits are available, although they are quite expensive. You can read more about this treatment in the separate leaflet called Excessive Sweating (Hyperhidrosis). 

  • Excessively sweaty or smelly feet are socially embarrassing and can cause enormous distress to those affected.
  • This can include young people, who may become socially isolated and avoid useful activities as a result.
  • Increased dampness of the feet also increases the chance of foot infections such as athlete's foot, and of cuts to and breaks in the skin, leading to other infections.
  • In people with other conditions which put the feet at risk, such as diabetes, peripheral neuropathy and peripheral arterial disease, excess sweating (hyperhidrosis) can contribute to the risks of foot infection leading to more serious conditions such as a skin infection (called cellulitis) and ulceration.

Sweating is normal. It has three main functions:

  • Heat regulation - sweating cools the body by wetting the surface of the skin.
  • Excretion - another way for the body to get rid of water and salts.
  • Skin protection - sweat is slightly acidic and this helps protect the skin from germs (bacteria). Sweat also helps keep the skin supple.

Sweating on the soles has a fourth possible function of increasing friction on bare feet. This is thought to have helped our ancestors to increase the grip of feet on the ground when running from predators or any other threat.

Sweat is produced in sweat glands, which are distributed all over the body. With the exception of specialised sweat glands in the armpit and groin, most sweat glands are of a type called eccrine glands. They are set deep in the skin and are served by nerves and arteries.

The number of working sweat glands varies between parts of the body - and also between different people. In a pair of feet there are normally about 250,000 sweat glands which typically produce about half a pint of perspiration a day. Sweat glands are more concentrated on the feet than in any other part of the body.

When sweating activity is low only a small proportion of the glands will be working - as sweating increases, more glands are 'recruited'. The differences between people in terms of how much they sweat are in part due to how quickly and readily their glands are called into action.

Sweat is mostly water. However, it does contain some salts, including sodium chloride - which is why it has a salty taste.

How much do feet normally sweat?

The total amount of sweat we produce depends on the number of working sweat glands and their activity. This activity is regulated by nerves and hormones and affected by gender (men sweat more than women). When all the sweat glands are working at maximum capacity, the rate of perspiration for a human being may exceed three litres an hour.

Apocrine glands are found in the armpit and groin. These differ from eccrine glands in that their sweat contains hormones, proteins and sebum and is oily and cloudy. However, they are not present in the feet.

What makes you sweat more?

Excessive sweating most often occurs on palms, soles, face, scalp and armpits. Anyone can experience it. However, it's more common in teenagers and pregnant women because hormonal changes make them sweat more. The common causes of increased foot sweating are:

Further reading and references

  • ; NICE CKS, July 2013 (UK access only)

  • ; Sweaty, smelly hands and feet. Aust Fam Physician. 2009 Sep38(9):666-9.

How to stop sweating so much
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