Paeds · paediatric-dermatology
Seborrhoeic dermatitis and cradle cap
Also known as infantile seborrhoeic dermatitis · cradle cap · seborrhoeic dermatitis of infancy · infantile seborrhoeic eczema · dandruff · Malassezia dermatitis · Leiner disease · erythroderma desquamativum · napkin psoriasis · tinea capitis differential · ketoconazole shampoo
A fellowship approach to seborrhoeic dermatitis and cradle cap (infantile seborrhoeic dermatitis): the greasy yellow scale over the scalp vertex, the face, the flexures, and the nappy area of a well, non-itchy infant in the first three months of life, the absent pruritus as the single decisive feature that separates it from atopic dermatitis alongside the greasy rather than dry scale and the nappy-area involvement atopic dermatitis characteristically spares, the Malassezia-driven pathophysiology on the androgen-stimulated infant sebum, the benign and self-limiting course that clears by six to twelve months on the evidence of the Victoire 2019 Cochrane review with its very low-certainty evidence and the favourable prognosis regardless of intervention, the gentle scalp-care management of an emollient or vegetable oil to soften the scale, gentle brushing, and a mild baby shampoo, the second-line ketoconazole two per cent shampoo and hydrocortisone one per cent for the refractory or extensive case, and the red flags that escalate the management — the generalised erythroderma and desquamation of Leiner disease with its complement C3 or C5 dysfunction, the failure to thrive, and the refractory disease beyond infancy that prompts the immunodeficiency, HIV, and Langerhans cell histiocytosis workup.
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Red flags
- A well, non-itchy infant of the first three months with the greasy yellow scale over the scalp vertex, the face, the flexures, and the nappy area has infantile seborrhoeic dermatitis until proven otherwise, and the recognition is clinical before any swab or scraping
- The generalised erythroderma and the desquamation in the infant, with the diarrhoea, the recurrent infection, and the failure to thrive, is Leiner disease (erythroderma desquamativum) — a life-threatening emergency of complement C3 deficiency or C5 dysfunction that demands admission, the complement studies, the fresh-frozen plasma, and the antibiotics
- The refractory or the severe seborrhoeic-like eruption that persists or worsens beyond infancy, with the failure to thrive, demands the immunodeficiency, the HIV, and the Langerhans cell histiocytosis workup, because the benign cradle cap clears by six to twelve months
- The scaly scalp with the patchy hair loss, the broken hairs, and the lymphadenopathy is tinea capitis, not cradle cap, and it needs the potassium hydroxide preparation, the fungal culture, and the oral antifungal
- The potent topical steroid applied to the infant face or flexures is overtreatment that risks the skin atrophy and the systemic absorption, because cradle cap is managed by the reassurance and the gentle scalp care and the mild hydrocortisone reserved for the inflamed case
Life stages
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Clinical exam formats
Board mappings
- Dermatology - recognise cradle cap and infantile seborrhoeic dermatitis and separate them from atopic dermatitis
- Primary care and acute presentations - the scaly infant scalp and the benign self-limiting course
- Dermatology - the Malassezia pathophysiology and the topical antifungal and mild corticosteroid management
- Acute and critical care - the generalised erythroderma of Leiner disease and the refractory-disease immunodeficiency workup
- Dermatology 10-12
- Neonates and infants 10-12
- Short Cases
- Long Cases
- 9. Dermatology - cradle cap and infantile seborrhoeic dermatitis
- 1. Clinical assessment of the scaly infant scalp
- Foundation of Practice (FOP)
- Theory and Science (TAS)
- Applied Knowledge in Practice (AKP)
- Clinical
- History
- Communication
- General Pediatrics Content Outline - Neonatology and Dermatology
- General Pediatrics Content Outline - Universal Task 3: Physical Examination and Universal Task 5: Patient Management
- Patient Care 5: Patient Management
- Medical Knowledge 2: Conditions common in pediatric primary care including cradle cap and seborrhoeic dermatitis
- Medical Expert
- Pediatrics: Neonatal and dermatology applied domain
A six-week-old boy is brought to the general practice by his parents, who have noticed a yellow, greasy, crusty layer over his scalp for the past two weeks. He is feeding well, gaining weight, and smiling, and he is not scratching or irritable. The scale sits over the vertex and the anterior fontanelle, with a little behind the ears and in the eyebrows, and there is a faint salmon-pink patch in the napkin folds. The parents are anxious that he has an infection or an eczema, and they have been applying a potent steroid cream borrowed from a relative. The pattern is classic for the infantile seborrhoeic dermatitis. The recognition is clinical, the reassurance is the first treatment, the potent steroid is stopped, and the gentle scalp care is begun. [1] [5]
Hold the infantile seborrhoeic dermatitis against the atopic dermatitis by three features. Greasy — the scale is yellow and oily, not the dry, flaky, eczematous scale of the atopic rash. Nappy — the napkin area and the flexures are involved, whereas the atopic dermatitis characteristically spares the nappy because the moisture preserves the barrier. Non-itchy — the infant is well and settled and does not scratch, whereas the atopic infant is itchy, irritable, and sleep-disturbed. Two of the three settle the diagnosis, and the absent pruritus is the single decisive one. [5] [9]
Overview & Definition
Infantile seborrhoeic dermatitis is a common, benign, inflammatory scaling eruption of the first three months of life, in which a greasy yellow scale and a faint salmon-pink erythema settle over the sebum-rich and the intertriginous skin. When it sits on the scalp it carries the familiar name cradle cap, and it extends readily to the face, ears, neck folds, axillae, and the nappy area. The infant is well, feeding normally, and — the decisive point — not itchy. [1] [5]
The clinical importance of cradle cap lies in the reassurance it demands and the overtreatment it invites. The condition is self-limiting, it clears by six to twelve months, and it leaves no scar, yet the visible scale distresses the parents and drives the search for a cure that the evidence does not support. The Victoire 2019 Cochrane review found only the very low-certainty evidence for any active treatment, a favourable prognosis regardless of the intervention, and the absence of any trial of the mineral oil, the salicylic acid, or the antifungal that the practice routinely reaches for. The fellowship task is to name the condition confidently, to separate it from the itchy atopic dermatitis, and to resist the potent steroid and the unnecessary investigation. [1] [2]
The page that follows treats cradle cap as the generalist encounters it: recognised on the three features, managed by the reassurance and the gentle scalp care, and protected from the overtreatment. It then widens to the seborrhoeic dermatitis of the older child and the adolescent, where the same Malassezia mechanism drives the dandruff and the facial and the presternal scale, and to the red-flag escalations — the Leiner disease erythroderma, the refractory disease beyond infancy, and the tinea capitis with the hair loss — that change the management from the reassurance to the referral and the workup. [4] [7]
References11ShowHide
- [1]Victoire A, Magin P, Coughlan J, van Driel ML. Interventions for infantile seborrhoeic dermatitis (including cradle cap). Cochrane Database of Systematic Reviews, 2019.PMID 30828791
- [2]Hassan S, Szeto MD, Sivesind TE, et al. From the Cochrane Library: Interventions for infantile seborrheic dermatitis (including cradle cap). Journal of the American Academy of Dermatology, 2022.PMID 34571061
- [3]Sanghvi SY, Schwartz RA. Leiner's disease (erythroderma desquamativum): A review and approach to therapy. Dermatologic Therapy, 2021.PMID 33166012
- [4]Navarro Triviño FJ, Velasco Amador JP, Rivera Ruiz I. Seborrheic Dermatitis Revisited: Pathophysiology, Diagnosis, and Emerging Therapies-A Narrative Review. Biomedicines, 2025.PMID 41153741
- [5]Patrizi A, Neri I, Ricci G, et al. Advances in pharmacotherapeutic management of common skin diseases in neonates and infants. Expert Opinion on Pharmacotherapy, 2017.PMID 28429969
- [6]Brodell RT, Patel S, Venglarcik JS, et al. The safety of ketoconazole shampoo for infantile seborrheic dermatitis. Pediatric Dermatology, 1998.PMID 9796598
- [7]Wasim I, Mondal NS, Dey J, et al. Seborrheic dermatitis and dandruff: An overview of pathogenesis, role of Malassezia spp., and natural treatment approaches. Journal de Mycologie Medicale, 2026.PMID 41616707
- [8]Xu Y, Tong X. The dual roles of T cells and keratinocytes in seborrheic dermatitis: a narrative review. European Journal of Medical Research, 2025.PMID 40999460
- [9]Darlenski R, Fluhr JW. How do the skin barrier and microbiome adapt to the extra-uterine environment after birth? Implications for the clinical practice. International Journal of Cosmetic Science, 2023.PMID 36692960
- [10]Vorapreechapanich A, Thammahong A, Chatsuwan T, et al. Perturbations in the skin microbiome of infantile and adult seborrheic dermatitis and new treatment options based on restoring a healthy skin microbiome. International Journal of Dermatology, 2025.PMID 39526559
- [11]Chernyshov PV, Vozianova SV, Chubar OV. Quality of Life of Infants, Toddlers and Preschoolers with Seborrhoeic, Allergic Contact and Atopic Dermatitis Before and During COVID-19 Pandemic. Dermatology and Therapy, 2021.PMID 34562266