17865 Body Odor

Overview

Body odor is an unpleasant smell coming from your body. It is not caused by sweat itself — fresh sweat has almost no smell. The smell comes from bacteria that live on your skin. These bacteria break down sweat and dead skin cells and release smelly chemicals. Body odor most often comes from the armpits, groin, and feet, because these areas sweat a lot and stay warm and moist. The medical word for it is bromhidrosis.

Yes. Body odor is extremely common and is not a sign of being unclean. Almost everyone has some body odor at times, especially in hot weather, during exercise, or when stressed.

Anyone can get body odor. It usually starts around puberty, when the sweat glands under the arms and in the groin become more active. It is more noticeable in people who sweat a lot, work in hot places, play a lot of sport, or have certain health conditions.

Symptoms

Common symptoms

• A noticeable smell from the armpits, groin, or feet
• Smell that gets stronger after exercise, hot weather, or stress
• Clothes, especially synthetic ones, that keep the smell even after washing
• White or yellowish stains on the underarms of shirts
• Damp, sweaty skin in skin folds such as under the breasts or belly
• Strong foot odor and damp socks
• Smell that comes back soon after washing

Causes

Main causes

• Bacteria on the skin breaking down sweat and releasing smelly chemicals
• Sweat from the glands under the arms and in the groin, which becomes more active from puberty onward
• Feet kept warm and damp inside shoes for hours
• Not washing often enough, or not drying skin folds properly after washing
• Wearing synthetic fabrics that trap sweat and hold smell
• Certain foods and drinks, such as garlic, onions, spicy food, and alcohol
• Smoking
• Hormonal changes, including puberty, periods, pregnancy, and the menopause
• Some medicines that make you sweat more or change how your body smells
• Health conditions such as diabetes, thyroid problems, liver or kidney disease, and skin infections
• Mouth and dental problems, which can cause bad breath
• Rare inherited conditions that change how the body processes certain foods

Risk factors

• Being in puberty or having naturally active sweat glands
• Living in a hot or humid climate
• Doing physical work or lots of exercise
• Being overweight, which increases sweating and skin-fold moisture
• Having a condition that causes heavy sweating
• Diabetes or other long-term health conditions
• Depression or low mood, which can make daily washing harder
• Wearing tight shoes or the same pair of shoes every day

When to see a doctor

See a doctor urgently if:

• Body odor with a high fever, shaking chills, or confusion
• Red, hot, spreading, or painful skin, or skin with pus
• A foot wound or ulcer that is not healing, especially with diabetes
• Unexplained weight loss or drenching night sweats
• Fruity-smelling breath with vomiting or drowsiness

Book a routine appointment if:

• Body odor that continues despite daily washing and clean clothes
• Sweating so much that it affects your work, study, or social life
• A clear change in how your body smells that lasts more than a few weeks
• Foot odor with cracked, peeling, or itchy skin between the toes
• Strong body odor in a child who has not yet started puberty
• Mouth odor that does not improve with brushing and flossing

Diagnosis

A doctor can usually work out the cause by talking with you and looking at your skin. They will ask about your washing routine, the clothes and shoes you wear, how much you sweat, your diet, your medicines, and any other symptoms. They will often check your underarms, skin folds, feet, and mouth. Most people do not need any tests at all.

Tests that may be done

• Often no tests, if the cause is clear from your story and examination
• A skin swab if the skin looks infected
• Blood tests to check blood sugar, thyroid, liver, and kidney function
• A urine test if a rare metabolic condition is suspected
• A referral to a skin specialist (dermatologist) if simple treatments are not helping

What to expect at your appointment

Your appointment is usually short and private. Your doctor will ask personal questions about washing and smell because it helps them help you. You can bring a trusted friend or family member if that makes you feel more comfortable. Most people leave with practical advice and, if needed, a stronger antiperspirant from a pharmacist or treatment for a skin infection.

Treatment

For most people, body odor improves a lot with small changes to washing, clothing, and sweating. Odor that continues despite good hygiene can be treated with stronger antiperspirants from a pharmacist or doctor, or with treatment for skin infections. If another health condition is causing the smell, treating that condition is the key step.

Self-care at home

• Wash daily with plain soap and water, paying attention to the armpits, groin, feet, and skin folds
• Dry your skin fully after washing, especially in skin folds and between the toes
• Use an antiperspirant, which reduces sweating, rather than only a deodorant, which mainly covers the smell
• Wear loose, breathable fabrics such as cotton, and change sweaty clothes promptly
• Change socks daily, or more often if your feet sweat a lot
• Rotate your shoes and let each pair dry out fully between wears
• Trim or shave underarm hair if you wish — hair holds sweat and smell
• Wash clothes at the temperature on the care label and do not leave damp laundry sitting in the machine
• Keep your mouth fresh with regular brushing, flossing, and dental check-ups

Medical treatments

If self-care is not enough, a pharmacist or doctor can suggest stronger antiperspirants that reduce how much you sweat, rather than just covering the smell. They can also treat skin infections or sore, irritated skin folds. People who sweat very heavily may be referred to a specialist, who can offer clinic-based treatments that reduce sweating. If a condition such as diabetes or a thyroid problem is found, treating it often improves the smell. Your doctor will explain the options, benefits, and possible side effects before you decide anything together.

When is surgery considered?

Surgery is rarely needed for body odor. It may be discussed for a small number of people with severe sweating under the arms that has not improved with other treatments, where sweat glands can be reduced or removed. This is a specialist decision and is only considered after simpler options have been tried. Most people never need it.

Living with this condition

Body odor is usually managed with a simple routine rather than a cure. A daily wash, a good antiperspirant, clean breathable clothes, and dry shoes cover most situations. Plan ahead for hot days, exercise, and travel by keeping spare socks or a fresh shirt with you. If you notice the smell changing, write down when it started and anything else that changed, so you can share it with your doctor.

Lifestyle tips

• Build washing and drying into a routine you can keep, even on low-energy days
• Choose breathable fabrics and avoid tight clothing in hot weather
• Keep a small kit with you — deodorant, spare socks, or a fresh top — for long days
• Quit smoking if you can; your doctor or pharmacist can offer free support
• Cut back on alcohol and very spicy foods if you notice they change your smell
• Look after your feet with daily washing, drying, and nail care
• Attend routine health checks if you have a long-term condition such as diabetes

Diet and exercise

No special diet is needed for body odor. Some people notice that garlic, onions, spicy food, or alcohol change how they smell, and cutting back can help if it bothers you. Drink water regularly and eat a balanced diet for general health. Regular exercise is good for you and does not make body odor worse in the long run — just shower and change clothes afterwards, and choose breathable workout clothing.

Mental health and emotional wellbeing

Body odor can be genuinely upsetting. It can make people avoid social situations, worry constantly about how they smell, or feel ashamed. These feelings are common and understandable, and they are not a sign of weakness. If worry about body odor is affecting your daily life, sleep, or mood, please tell your doctor — talking therapies can help a lot. If you ever feel overwhelmed or have thoughts of harming yourself, contact your local emergency number or a crisis support line in your country straight away, or reach out to someone you trust.

Prevention

You cannot stop your body from sweating, and you would not want to — sweating helps control your body temperature. But you can greatly reduce body odor by keeping your skin clean and dry, wearing breathable fabrics, and dealing with sweat promptly.

Vaccines

There is no vaccine for body odor.

Screening programmes

There is no screening programme for body odor. If you have a condition that can change how your body smells, such as diabetes, attending your routine check-ups is the best way to catch problems early.

Complications

If left untreated

• Skin irritation, chafing, and fungal or bacterial infections in skin folds
• Ongoing embarrassment and low confidence
• Avoiding work, school, sport, or social events
• Anxiety or low mood about how you smell
• A missed underlying condition, such as diabetes or a thyroid problem, if the smell is new and unexplained

Long-term outlook

The outlook is very good. For most people, body odor is a normal and manageable part of life that improves with simple daily habits. If there is an underlying health condition, finding and treating it usually helps. There is no need to feel embarrassed about asking for help — small changes often make a big difference.

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