Intertrigo: Rash in Skin Folds, Causes, Treatment, and Prevention

Intertrigo is inflammation where two skin surfaces touch or rub, usually in a warm, moist fold. It can happen under the breasts, beneath an abdominal fold, in the groin, between the buttocks, in the armpits, or between the toes. The skin may feel sore, itchy, or burning, and can look red, darker than nearby skin, shiny, damp, cracked, or raw. Yeast or bacteria can grow in already irritated skin, but intertrigo does not automatically mean there is an infection.

The first steps are usually gentle: reduce rubbing, keep the fold clean and dry, and protect irritated skin from further moisture. When a secondary infection is suspected, treatment depends on the cause. Candida yeast, bacteria, dermatophyte fungi, eczema, inverse psoriasis, and other conditions can look similar, so a persistent or worsening rash should be examined instead of treated with several creams at once.

Quick guide: intertrigo is a pattern of inflammation rather than one specific germ; it can affect people of any age, skin tone, or body shape; odor, drainage, spreading redness, or repeated flares deserve evaluation; and a clinician may use a swab, skin scraping, or other test to choose targeted treatment.

What is intertrigo?

Intertrigo is a rash or inflamed area in a skin crease where surfaces press together. Air circulates less freely in folds, and sweat or other moisture can remain on the skin. Movement then creates rubbing. Over time, warmth, moisture, and friction can soften the outer skin layer, leading to irritation, small cracks, or peeling. A compromised skin barrier can be more vulnerable to infection.

Intertrigo can be recent, long-lasting, or recurrent. It may affect one fold or several at once. Common sites include the underarm, the skin beneath the breasts, the neck, a fold beneath the abdomen, the groin and inner thighs, the buttock cleft, the navel, and the spaces between fingers or toes. Tight shoes, gloves, braces, or other devices can create moist areas too.

Intertrigo is not a measure of cleanliness. It can occur despite regular bathing because the main problem is the local mix of skin contact, moisture, warmth, and friction. It can also occur in people who do not have larger skin folds. Body size is one possible contributor, but sweat, mobility, diabetes, incontinence, medication, clothing, and medical devices may matter as well. A person should not be blamed or shamed for having a rash.

The term is sometimes used as if it means Candida infection. That is not quite right. Primary intertrigo can be simple friction-related inflammation without a specific germ. Secondary intertrigo has yeast, bacteria, or another infection growing in the irritated area. Intertrigo is therefore a useful description of the location and skin damage; it does not identify the cause by itself.

Causes and factors that can increase risk

Skin-to-skin friction and trapped moisture are central factors. Sweating, hot weather, physical activity, long periods sitting or lying down, incontinence, wound drainage, and poor air circulation can keep a fold damp. Clothing that is tight, nonbreathable, or slow to dry can contribute. Braces, splints, prostheses, and other devices may trap moisture against the skin or create repetitive pressure.

Some health conditions can make folds more likely to become inflamed or infected. Diabetes can raise the chance of certain skin infections; immune-suppressing medicines or immune disorders can make infection more likely; and swelling, limited mobility, or urinary or bowel incontinence may keep skin damp. Infants can develop intertrigo in the diaper area because of friction and prolonged contact with urine or stool. These factors do not mean an infection is inevitable, and not everyone with one of them develops a rash.

Yeasts such as Candida can overgrow in warm, moist folds. Bacteria can also grow on broken or macerated skin. The toe webs may involve more than one organism, especially when skin is wet and damaged. Sometimes an infection starts after friction-related inflammation; sometimes infection is the main driver. A clinician may need to test if the pattern is unclear or does not improve as expected.

Repeated irritation can create a cycle: moisture softens skin, rubbing damages it, inflammation makes it sting, and creams or vigorous cleaning add more irritation. The goal is not to scrub the rash away. Gentle cleansing, careful drying, and reducing friction give the barrier a chance to recover while any infection is treated appropriately.

Symptoms and what the rash may look like

Intertrigo can cause itching, stinging, burning, tenderness, or a raw sensation. The affected area may be red, pink, brown, violet, or darker than nearby skin, depending on skin tone and the stage of inflammation. It may look shiny or damp, with softened skin, peeling, small cracks, or shallow erosions. In deeper folds, the rash may be mirrored on both sides of the crease where the skin touches.

If the area is very moist or secondarily infected, it may have drainage, an unpleasant odor, or more pain. Candida often creates a bright-red or deeper-colored macerated patch with small “satellite” bumps or pustules just outside the main rash. Bacterial infection can cause discharge and odor; some bacterial infections, especially in toe webs, may appear white, greenish, or unusually wet. Those clues are not reliable enough for a home diagnosis.

In people with darker skin, redness may be harder to see. The rash can look darker, purple, gray, or less distinct, and inflammation may be easier to notice by warmth, tenderness, swelling, peeling, or cracking. Photos can also change color depending on light and camera settings. A clinician should assess the skin rather than relying on a single color description.

Many other conditions appear in folds. Inverse psoriasis often forms smooth, sharply outlined patches and may also affect the scalp, elbows, knees, or nails. Eczema or contact dermatitis can be itchy and may match the area exposed to a product. Ringworm may form an expanding scaly border, while erythrasma can look like a red-brown patch with fine scale. A rash that keeps returning in the same place or does not respond to expected care should be reassessed.

How intertrigo is diagnosed

A clinician can often recognize intertrigo from where the rash is and how it looks. They may ask when it began, what makes it better or worse, whether it recurs, how much it hurts or itches, and what products or medicines have been used. They may ask about sweating, diabetes, incontinence, mobility, recent antibiotics, immune suppression, tight clothing, shoes, or medical devices. This helps distinguish friction-related irritation from infection or another fold rash.

If the rash is severe, has drainage or odor, is recurrent, or has not improved with simple skin care, testing may help. A swab can be sent for bacterial testing. A skin scraping can be examined for yeast or dermatophyte fungi, sometimes with a potassium hydroxide test. A Wood lamp may help identify erythrasma, a bacterial condition that can resemble fungal intertrigo. A biopsy is uncommon but may be considered if the rash is unusual or treatment-resistant.

Sometimes a clinician will treat the likely cause based on examination without testing. If treatment fails, that is useful information rather than proof that the person did something wrong: the original diagnosis may need to be reconsidered, an infection may need a different treatment, or there may be a contributing source of moisture or friction that is still present.

At-home care for mild irritation

For a mild fold rash without signs of infection or severe skin breakdown, focus on reducing moisture and rubbing. Wash gently with lukewarm water and a mild, fragrance-free cleanser if needed, then rinse away residue. Pat the fold dry with a clean, soft towel rather than rubbing. A cool hair dryer held at a safe distance can help dry a hard-to-reach fold; avoid hot air, which can burn or further irritate skin.

Allow air to reach the area when practical. Wear loose, breathable clothing and change out of damp exercise clothes promptly. A clean, soft, absorbent piece of fabric may be placed between opposing surfaces to reduce skin-on-skin contact; change it when damp and avoid material that sheds, sticks, or causes pressure. A clinician or nurse can suggest a moisture-wicking textile if the area keeps staying wet.

A thin layer of a bland barrier ointment, such as petrolatum or zinc oxide, may reduce friction for some people when the skin is intact or mildly irritated. Use only a small amount and stop if it stings or traps more moisture. Avoid fragrance, harsh scrubs, deodorant, alcohol-based products, essential oils, and aggressive exfoliants on irritated or broken skin. Powder can clump in damp folds or be inhaled, so ask a clinician before relying on a powder or applying one near an infant’s face.

Keep skin folds clean, but do not scrub repeatedly or over-wash. Excessive cleaning can strip oils and worsen irritation. If a rash is related to incontinence, change wet garments promptly and ask a clinician about a skin-protection plan. If a medical device creates rubbing, ask the device clinician or nurse about fit and safe padding instead of removing or altering it yourself.

Medical treatment

There is no single cream for every case of intertrigo. Treatment depends on whether the main problem is friction-related inflammation, yeast, bacteria, a dermatophyte, eczema, psoriasis, or a combination. A clinician may recommend an antifungal medicine if yeast or fungus is likely, or an antibacterial treatment if a bacterial infection is identified. Antibiotics do not treat yeast, and antifungals do not treat bacteria.

A brief course of a low-strength anti-inflammatory cream may be prescribed for selected cases, but skin folds are delicate. Strong or prolonged topical steroid use can thin the skin, cause stretch marks, change skin color, or hide a fungal infection. Using a steroid alone when the rash is fungal may allow the infection to spread or change its appearance. Combination creams should be used only when a clinician recommends the specific product and duration.

Oral antifungal or antibiotic treatment is reserved for selected cases, such as extensive infection, severe disease, or treatment failure, and should be chosen by a clinician. Do not take leftover antibiotics or use another person's prescription. Recurrent or treatment-resistant rash may require a swab, scraping, or review of contributing conditions such as diabetes, medication effects, persistent moisture, or a different diagnosis.

In rare, severe, or persistent cases, clinicians may discuss additional strategies, including specialized dressings or a procedure to reduce a large fold. These are not first steps for most people. The evidence for some intertrigo treatments is limited, so a practical plan focuses on the observed cause, reducing friction and moisture, and reassessing if the rash does not improve.

Prevention and recurrence

Intertrigo may return if the same combination of moisture, skin contact, and rubbing continues. Helpful routines include drying folds after bathing and exercise, changing out of damp clothing, using breathable garments, and checking areas beneath breasts, under the abdomen, or between toes if they tend to stay damp. People with excessive sweating can ask a clinician about options that will not irritate the affected skin.

If a person has diabetes, keeping regular diabetes-care visits and following the treatment plan may help reduce infection risk, although it cannot prevent every rash. If mobility or incontinence contributes, a caregiver or wound-care nurse may help create a practical skin-protection routine. In infants, frequent diaper changes, gentle cleaning, and drying can reduce prolonged moisture; ask a pediatric clinician before using antifungal or steroid medicines.

Weight management can be one part of reducing friction for some people with larger skin folds, but it is not the only approach and should not be presented as a condition for receiving care. Clothing, moisture-wicking fabrics, protective barriers, a well-fitted support garment, and medical treatment can help people with many body types. Discuss goals in a way that respects personal health needs and preferences.

Repeated episodes should prompt a review of diagnosis and daily exposures rather than escalating to stronger creams without guidance. A clinician may ask about laundry products, wipes, deodorants, body powders, topical medicines, footwear, or device materials that could cause contact irritation. Keeping a short note of when the rash flares and what touches the area may help identify a pattern.

When to contact a clinician

Arrange an appointment if a fold rash is not improving with gentle drying and friction reduction, repeatedly comes back, spreads outside the fold, or causes significant pain. Also seek advice if there is drainage, odor, cracked or open skin, blisters, or uncertainty about whether the rash is fungal, bacterial, or inflammatory. People with diabetes, immune suppression, severe obesity, limited mobility, or a medical device touching the area may benefit from earlier assessment.

Get same-day medical advice if the skin becomes rapidly more red, hot, swollen, very painful, or begins draining pus, particularly if fever or chills occur. Those signs may indicate a spreading infection. A person who feels faint, confused, breathless, or severely unwell needs urgent emergency care.

At an appointment, bring a list of creams, powders, wipes, and medicines used on the area. Mention diabetes, recent antibiotics, steroids, immune-suppressing treatment, sweating, incontinence, and any pattern of recurrence. If comfortable, a photo from an earlier flare may help describe how the rash changed, but an examination is still useful.

Frequently asked questions

Sources and further reading

• DermNet: Intertrigo
• DermNet: Candidal intertrigo
• MedlinePlus: Intertrigo
• Review of intertrigo diagnosis, management, and prevention in adults
• Primary Care Dermatology Society: Intertrigo guidance
• DermNet: Erythrasma, a possible skin-fold mimic
• Cleveland Clinic: Intertrigo

Medical information notice: This educational article does not diagnose a rash or replace individualized care. Skin-fold rashes have several possible causes, and the wrong cream can worsen some infections or irritate delicate skin. Consult a qualified health professional for persistent, recurrent, painful, or spreading symptoms and before using prescription treatments.