Most diaper rashes are irritant contact dermatitis. Beefy red rash with satellite pustules and skin-fold involvement = candida. Persistent / unusual rashes warrant work-up for zinc deficiency, Langerhans cell histiocytosis, or NAT (cigarette burns, scald).
🚩 Red-flag clues (must not miss)
- •Punched-out lesions, skin-fold sparing, scalp/groin = Langerhans cell histiocytosis
- •Symmetric perioral + perianal + acral dermatitis = acrodermatitis enteropathica (zinc def)
- •Bullous lesions, peeling, fever = staph scalded skin
- •Pattern suggesting immersion burn (sock/glove distribution) = NAT
Exam
- Distribution: convex surfaces (irritant) vs skin folds (candida)
- Satellite papules/pustules = candida
- Vesicles, erosions = HSV
- Honey-crusted = impetigo
Differential & next step
| Diagnosis | Clue | Next step |
|---|---|---|
| Irritant contact dermatitis | Spares folds, convex surfaces | Frequent diaper changes, barrier (zinc oxide) |
| Candidiasis | Beefy red, satellite pustules, fold involvement | Topical nystatin or clotrimazole BID–QID × 7–10 d |
| Seborrheic dermatitis | Greasy yellow scale, scalp involvement | Low-potency steroid + ketoconazole |
| Bacterial (staph/strep) | Honey crust, bullae, fever | Topical mupirocin or PO cephalexin |
| Allergic contact (wipes, dye) | Sharp borders matching product | Eliminate trigger |
| Acrodermatitis enteropathica | Periorificial + acral, FTT, diarrhea | Serum zinc; supplementation |
| LCH | Persistent, scalp + groin, hepatosplenomegaly | Skin biopsy, oncology |
| NAT (immersion burn) | Sharp 'sock' or 'doughnut' demarcation | Social work, NAT protocol |
Medications & dosing
| Drug | Dose | Notes |
|---|---|---|
| Zinc oxide barrier paste | Apply liberally each diaper change | |
| Nystatin cream/ointment | Apply BID–QID × 7–10 d (candida) | |
| Clotrimazole 1% cream | Apply BID × 7–14 d | |
| Hydrocortisone 1% (low potency) | BID × ≤ 7 d if inflamed | Avoid fluorinated/high-potency on diaper area — ↑ atrophy/striae |
| Mupirocin 2% | TID × 5 d for impetigo |
Management / next steps
- Air-dry, frequent changes, gentle cleansing (water > wipes when irritated)
- Barrier paste with each change
- Antifungal if candida; antibiotic if bacterial
- Refer if persistent > 2 weeks or atypical features
Source: https://fprmed.com/fprmedcom/Pages/Pedi/Diaper_Rash.html
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