Intertrigo is inflammation of skin folds caused by friction, moisture and heat. It is an extremely common condition that disproportionately affects people who are overweight or obese, elderly patients, those with diabetes, and anyone with deep skin folds. Despite its prevalence, many patients are embarrassed to seek help, making the accessible and discreet pharmacy environment particularly valuable.
What Is Intertrigo?
Intertrigo develops in areas where skin surfaces rub together, trapping moisture and creating a warm, humid microenvironment. The condition begins as simple frictional irritation but frequently becomes secondarily infected with Candida (yeast), bacteria, or both.
Common sites include:
| Location | Risk factors |
|---|---|
| Under the breasts (submammary) | Large breast size, underwire bras, hot weather |
| Groin folds (inguinal) | Obesity, incontinence, tight clothing |
| Axillae (armpits) | Excessive sweating, antiperspirant sensitivity |
| Abdominal folds | Obesity, post-surgical skin folds |
| Between toes (interdigital) | Occlusive footwear, diabetes |
| Neck folds | Infants, obesity |
The progression typically follows a pattern: friction and moisture cause redness and soreness, the damaged skin barrier allows Candida colonisation (often already present on the skin), and a secondary fungal infection produces the characteristic satellite lesions — small red spots or pustules surrounding the main rash area.
Recognising the Cause
The treatment depends on whether the intertrigo is simple (non-infected), candidal, or bacterial:
| Type | Appearance | Key features |
|---|---|---|
| Simple (irritant) | Symmetrical red patches in skin folds | No satellite lesions, no oozing, mild soreness |
| Candidal | Bright red, glazed appearance | Satellite papules or pustules at edges, itch > pain |
| Bacterial | Red, oozing, may have yellow crusting | Pain > itch, foul smell, spreading redness |
Candidal intertrigo is the most common secondary infection and the form most amenable to pharmacy management. The satellite lesion pattern — small red dots or pustules scattered beyond the main rash border — is the most reliable visual clue.
Pharmacy Treatment
For candidal intertrigo
Clotrimazole 1% cream is the first-line OTC antifungal. Apply a thin layer to the affected area and surrounding skin two to three times daily for at least two weeks, continuing for one week after symptoms resolve to prevent early relapse. Miconazole 2% cream is an equivalent alternative.
Advise patients to wash and thoroughly dry the area before application. The cream should not be applied thickly or under occlusive dressings, as this can worsen moisture trapping.
For simple (non-infected) intertrigo
When no secondary infection is present, the goal is to reduce friction and moisture:
- A barrier cream (Sudocrem, zinc and castor oil cream) applied to dry skin creates a protective layer
- Talc-free body powder (cornstarch-based) can absorb moisture — though it should be avoided once candidal infection is present, as Candida can feed on starch
- Soft cotton fabric strips placed between skin folds can wick moisture away — a practical tip for patients with large submammary or abdominal folds
Hydrocortisone with antifungal
For intertrigo with significant inflammation alongside candidal infection, a combined product such as Daktacort (miconazole 2% + hydrocortisone 1%) is available OTC. The hydrocortisone component reduces inflammation and itch rapidly while the antifungal treats the underlying infection.
Apply twice daily for a maximum of seven days. This product should not be used on the face or on children under 10 without medical advice.
Hygiene measures
Advise patients to:
- Wash affected areas daily with a soap substitute (emollient wash)
- Pat dry thoroughly — never rub — paying particular attention to skin folds
- Allow skin folds to air-dry before dressing
- Wear loose, breathable cotton clothing
- Change underwear and bras daily, washing at 60°C to kill fungal spores
- Avoid antiperspirants or fragranced products on inflamed skin
When to Refer
Pharmacy management is appropriate for mild to moderate intertrigo, particularly when candidal infection is the suspected cause. Refer to a GP if:
- The rash is spreading rapidly or there are signs of bacterial cellulitis (warmth, swelling, pain, fever)
- The patient has diabetes and the intertrigo is not responding to antifungal treatment within one week — diabetic patients are at higher risk of complicated skin infections
- There is a foul-smelling discharge suggesting bacterial superinfection
- The intertrigo is recurrent despite good hygiene and antifungal treatment — this may warrant investigation for underlying diabetes, immunosuppression or erythrasma (a bacterial mimic)
- The rash does not fit the typical intertrigo pattern — consider psoriasis (inverse psoriasis), seborrhoeic dermatitis or tinea cruris as differential diagnoses
Preventing Recurrence
Intertrigo tends to recur, particularly in patients with persistent risk factors. Long-term prevention strategies include:
- Daily skin fold hygiene with emollient wash and thorough drying
- Barrier cream application to vulnerable skin folds before physical activity or in hot weather
- Weight management support where appropriate — reducing skin fold depth reduces friction and moisture trapping
- Well-fitting, supportive bras (cotton-lined, non-wired where possible) for submammary intertrigo
- Moisture-wicking fabrics for underwear and sportswear
For patients with frequent recurrence, prophylactic clotrimazole cream applied once daily to at-risk areas during hot weather or periods of increased sweating can prevent candidal colonisation.
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