Intertrigo: Skin Fold Rash in the Groin, Under Breasts and Belly

Intertrigo is an inflamed, often sore rash in skin folds such as the groin, under the breasts, belly folds, underarms, inner thighs and neck, caused by skin rubbing against skin while heat and sweat stay trapped. It is very common in India’s hot, humid weather, frequently becomes infected with candida yeast, bacteria or ringworm fungus, and usually improves when the folds are kept clean and fully dry and any infection is treated correctly.

Many people feel embarrassed to mention a rash under the breasts or in the groin, and end up using whatever cream the chemist suggests. This guide explains what intertrigo is, why it keeps returning and what helps.

What is intertrigo?

Intertrigo literally means a rash where skin meets skin. When two skin surfaces rub together with sweat in between, the outer layer softens, breaks down and becomes inflamed. DermNet lists common sites as:

• Under the breasts
• Belly folds and the fold under the abdomen
• Groin and inner thighs
• Underarms
• Neck folds, especially in babies and in people with higher weight
• Between the toes and between the buttocks
• Behind the ears

What does intertrigo look and feel like?

• Red, pink, brown or purplish patches in the fold. On brown skin redness can be harder to see, and the area may look darker or shiny
• A mirror image pattern on both sides of the fold
• Moist, raw or cracked skin, sometimes with oozing
• Burning, stinging, itching or soreness, worse with sweat and movement
• Unpleasant odour if infection is present

Why is it so common in India?

Several local factors combine:

• Heat and humidity for much of the year, and heavy sweating during the monsoon
• Long commutes and long working hours in non air conditioned settings
• Tight or synthetic clothing, including some innerwear, leggings and uniforms
• Rising rates of obesity and diabetes, which increase skin folds and infection risk
• Delayed treatment and self medication with combination creams

Which infections can complicate intertrigo?

Intertrigo often becomes infected. Each type looks a little different and needs different treatment.

Type	Typical clues	Usual approach
Candida (yeast)	Bright red, moist, with small satellite spots at the edge	Antifungal treatment
Bacterial infection	Crusts, blisters, pus, odour, pain	Antiseptic or antibiotic as advised
Erythrasma	Persistent brown or pink patches, little scaling	Specific antibacterial treatment
Tinea (ringworm)	Ring shaped, raised, scaly edge that spreads outward	Antifungal course
Irritant only	Raw, sore, no infection signs	Drying, barrier care

Your doctor may diagnose this by examination and, if needed, a simple skin scraping (KOH test) or a Wood lamp. If ringworm is the cause in the groin, see our guide on jock itch and why it keeps coming back.

Who is at higher risk?

DermNet and published reviews describe these risk factors:

• Higher body weight and deep skin folds
• Diabetes, which also raises the risk of candida infection
• Excessive sweating. Read our hyperhidrosis guide
• Hot, humid climates
• Large breasts, especially without a well fitting supportive bra
• Limited mobility, being bedbound, or incontinence
• Older age and reduced immunity
• Babies, in the neck folds and nappy area. See our baby skin care and diaper rash guide

How can I prevent and care for intertrigo at home?

The core idea is simple: keep folds clean, cool, dry and free of friction. A systematic review of intertrigo in large skin folds found limited high quality evidence, but consistent advice to reduce moisture and friction and treat infection.

Daily steps that help:

1. Wash folds gently once or twice a day with water and a mild, soap free cleanser
2. Dry thoroughly. Pat dry with a soft towel, then allow air to reach the area. Some people use a hair dryer on a cool setting
3. Separate the folds. A soft, clean cotton cloth placed under the breasts or in belly folds absorbs sweat and reduces rubbing. Change it when damp
4. Wear loose, breathable cotton and change innerwear and bras when sweaty
5. Choose a supportive, well fitting cotton bra to lift the breasts off the skin below
6. Change out of sweaty clothes quickly after work, travel or exercise
7. Use a barrier cream such as a zinc based paste on sore, irritated skin if advised
8. Manage contributing factors, such as blood sugar control and gradual weight management where relevant

What should I avoid?

• Steroid, antifungal and antibiotic combination creams without a diagnosis. In India these are widely sold, but Indian pharmacology and dermatology experts have warned that they can worsen fungal infections and damage skin. Our guide to topical steroid misuse explains why
• Heavy, perfumed talc on raw skin
• Harsh antiseptic liquids, undiluted, on broken skin
• Home remedies such as lemon, toothpaste or raw turmeric paste in folds
• Scratching, which spreads infection and leaves dark marks

How does a dermatologist treat intertrigo?

Treatment depends on the cause. Your dermatologist may:

• Confirm whether infection is present and which type
• Prescribe an antifungal or antibacterial treatment suitable for the fold
• Use a mild anti inflammatory cream for a short period in selected cases, always under supervision
• Recommend a barrier cream or moisture wicking fabric for prevention
• Check for diabetes if infections keep recurring
• Treat related problems such as excessive sweating or fungal infection of the feet and nails

Dark marks left in the folds after the rash heals are common on brown skin and usually fade slowly once inflammation stops.

What about intertrigo in babies and older adults?

Intertrigo is common at both ends of life.

Babies have deep, chubby folds in the neck, armpits, groin and behind the knees, and milk, drool and sweat easily collect there. Gentle care helps:

• Clean the folds with plain water during baths and after feeds
• Pat dry carefully and let the skin air for a few minutes
• Dress babies in light cotton and avoid over wrapping in warm weather
• Change nappies often and use a barrier cream if advised
• See a doctor if the rash is bright red with spots around it, oozing, or not settling, as yeast infection is common

Older adults and people who are bedbound or have limited mobility are also at risk because of sweat, friction against sheets, and incontinence. Carers can help by:

• Checking skin folds daily during bathing
• Keeping the skin clean and dry after any leakage, and using a barrier product
• Changing position regularly and using breathable bedding
• Watching for skin breakdown, which can lead to sores

In both groups, avoid strong antiseptics, perfumed powders and steroid creams unless a doctor recommends them.

When to see a dermatologist

See a dermatologist or doctor if:

• The rash does not improve within one to two weeks of careful home care
• The skin is raw, oozing, crusted, very painful or smells bad
• You see spreading redness, swelling, pus or have a fever
• You have diabetes, reduced immunity or are bedbound
• The rash keeps coming back every summer or monsoon
• You have already used a steroid containing cream
• You are not sure whether it is intertrigo, ringworm or something else

If you would like advice in a private, comfortable setting, Dr. Maria offers online consultations where you can describe your symptoms, the products you have used and your health history.