Clinical Guides
Seborrhoeic Dermatitis
An India-adapted, source-grounded guide to recognising seborrhoeic dermatitis, judging scalp and skin severity, using antifungal and anti-inflammatory treatment safely, and recognising infant, immunosuppression and referral concerns.
MedNext Academy | 12 min read
Seborrhoeic Dermatitis
An India-adapted, source-grounded guide to recognising seborrhoeic dermatitis, judging scalp and skin severity, using antifungal and anti-inflammatory treatment safely, and recognising infant, immunosuppression and referral concerns.
Summary
Seborrhoeic dermatitis is a recurrent inflammatory dermatitis in sebaceous areas, commonly the scalp, eyebrows, glabella, nasolabial folds, retroauricular skin, beard area and presternal chest. It produces variable erythema, itch, burning and fine or greasy scale. Dandruff is the milder scalp-only end of the same clinical spectrum, while more inflamed disease can extend to the face, ears, trunk or flexures. Malassezia yeasts and host susceptibility contribute, but the condition is not a contagious infection and is not caused by poor hygiene. The appearance can be subtler in brown or black skin: ask about itch, burning, scaling, texture and colour change rather than excluding the diagnosis because redness is less obvious.
Severity is determined by distribution, inflammation, symptoms, hair or skin impact, recurrence, treatment response and associated illness, not by scale alone. A first consultation should inventory every shampoo, oil, fairness product, combination cream and steroid used. Management usually combines gentle cleansing, a topical antifungal chosen for the site, and limited clinician-supervised anti-inflammatory treatment when inflammation is troublesome. Maintenance is often needed because control is realistic but permanent eradication is not. This educational draft is not a personal prescription; current product information and examination must guide treatment.
How Common Is It?
Seborrhoeic dermatitis is common across primary care and dermatology, although reported frequency varies with age, climate, diagnostic definitions, skin phototype and access to care. Dandruff is particularly common after puberty. Disease often has a relapsing course, with flares during changes in weather, stress, illness or treatment interruption. It may be more extensive or difficult to control in people living with HIV, Parkinson disease or other neurologic illness, but most people with ordinary dandruff do not have an underlying systemic disorder.
A consultation count is not a population prevalence estimate. In India, people may self-treat for years with cosmetic anti-dandruff products, oils or steroid-containing combinations and only attend when scale, itch or pigment change becomes distressing. Examine the scalp and exposed areas rather than using product sales as a proxy for disease. Post-inflammatory hyperpigmentation or hypopigmentation may persist after inflammation improves and can be more visible than the original eruption in darker skin.
Explain that recurrence does not mean treatment failure or contagion. The aim is an agreed control plan: clear the flare, use an appropriate maintenance strategy, and review when the pattern changes. Do not impose a restrictive diet or blame cleanliness when there is no evidence that either explains an individual case.
Risk Factors
Risk reflects a combination of sebaceous activity, skin barrier behaviour, Malassezia-associated inflammation and host susceptibility. Adolescence and adulthood, oily skin, a history of dandruff, neurologic disease and immunosuppression are useful context, not diagnostic requirements. Ask about HIV risk and symptoms sensitively rather than labelling a patient from the rash alone. Severe, sudden, widespread or treatment-resistant disease deserves a broader review.
Record occupational heat, helmets, sweating, frequent shampooing, hair products, fragrance, dyes, essential oils and occlusive cosmetics. Irritant or allergic contact dermatitis can coexist and may be suggested by marked itch, burning, asymmetry or a new product. Facial steroid or steroid-antifungal combination use may suppress scale briefly while causing atrophy, telangiectasia, acneiform change or rebound; it should trigger a medication review, not blame. Hair oiling is culturally important in India. A small amount used briefly as a pre-wash scale-softener may be acceptable for some patients, but prolonged heavy oil on an inflamed scalp can worsen occlusion and must not replace antifungal care.
Infants have a separate, usually self-limiting pattern called cradle cap. Ask about onset, general wellbeing, growth, fever, bleeding, crusting and rash beyond typical areas. Atypical distribution, recurrent infection, poor growth or systemic symptoms should reopen the differential and referral threshold.
Diagnosis
Diagnosis is usually clinical, based on distribution, morphology and course. Document the phenotype and severity before treatment; consistent photographs can help follow-up with consent but cannot replace examination.
History
Ask when scale or rash began, which sites are involved, itch or pain, hair loss, flares, seasonal pattern and effect on sleep or work. Ask about dandruff products, shampoos, oils, cosmetics, topical steroids, antifungals, recent antibiotics and adherence. Enquire about psoriasis in the patient or family, atopy, HIV exposure or symptoms, neurologic disease, medicines and infant feeding or general health where relevant. Determine whether the patient has a red, painful eye or ear symptoms rather than assuming every facial scale is seborrhoeic.
Examination
Inspect scalp, hairline, eyebrows, glabella, nasolabial folds, ears, beard, chest and flexures. Describe the amount and character of scale, erythema, fissuring, crust, excoriation and borders. Look for thick sharply demarcated plaques, silvery scale, nail pitting, annular edge, pustules, scarring, alopecia, mucosal disease and signs of secondary infection. In darker skin assess palpation, warmth and pigmentary change as well as colour. For an infant assess scalp, folds, trunk, nappies, growth, hydration and general appearance.
Investigations
Routine tests are unnecessary in a typical case. KOH microscopy or fungal culture can help when dermatophyte infection is plausible, particularly with an annular, unilateral or inflammatory facial lesion. Consider bacterial sampling only when impetiginisation is clinically present. Biopsy is reserved for diagnostic uncertainty, scarring, unusual lesions or failure of a well-documented plan. Offer HIV testing according to consent, local policy and clinical indicators such as severe, widespread, sudden-onset or refractory disease or other suggestive findings; do not present seborrhoeic dermatitis as proof of HIV.
A patient with bilateral greasy scale in the scalp and nasolabial folds, no comedones and no systemic symptoms usually needs clinical treatment rather than a large laboratory panel.
Differential Diagnosis
Psoriasis may produce well-demarcated plaques, thicker silvery scale, nail changes or lesions beyond sebaceous sites; sebopsoriasis can have overlapping features and may need dermatology input. Atopic dermatitis often has a stronger itch and personal or family atopy, while allergic or irritant contact dermatitis follows a product or exposure and may be asymmetrical. Tinea capitis or faciei may be annular, broken-hair, inflammatory or unilateral and needs appropriate microscopy or culture rather than escalating steroid. Rosacea generally lacks greasy scale and has a different central facial pattern; periorificial dermatitis has papules around orifices.
Consider discoid lupus when there are scarring plaques, follicular plugging or photosensitivity, and consider dermatomyositis when there are characteristic muscle or systemic features. Langerhans cell histiocytosis is an important rare infant differential when there are persistent crusted or haemorrhagic lesions, widespread involvement, poor growth or systemic illness. Candidiasis, erythrasma and inverse psoriasis may mimic disease in folds.
The most useful discriminator is the whole pattern: site, border, scale quality, symptoms, exposures, systemic features and response to a coherent trial. A lesion that is unilateral, ulcerated, bleeding, scarring, rapidly progressive or unresponsive should not be repeatedly labelled seborrhoeic without reassessment.
Management
Begin with education and gentle care. Use lukewarm water, a non-soap cleanser or tolerable shampoo, avoid scratching, and stop fragranced or irritating products during a flare. For scalp disease, a clinician-selected medicated shampoo containing an antifungal such as ketoconazole, ciclopirox or another locally authorised option is commonly used according to its current label; leave-on time and frequency matter. Rotate only when response or tolerability requires it. Maintenance use at a lower frequency may reduce relapse, but the plan must follow the product label and local formulary.
For facial, retroauricular or trunk disease, a topical antifungal cream or wash may be selected for the site. If inflammation is marked, a mild topical corticosteroid can sometimes be used briefly under supervision; potent steroids should not be used on the face or folds. A topical calcineurin inhibitor may be a steroid-sparing specialist option, with counselling about transient burning and current regulatory advice. Do not combine several actives, use antibiotic creams for simple scale, or continue treatment indefinitely without review.
Soften adherent scalp scale gently before washing; avoid forceful picking. Hair oils may be used briefly as a pre-wash measure by people who tolerate them, but prolonged oiling is not treatment. Infant cradle cap is usually managed with emollient softening and a soft brush, avoiding picking and essential oils; persistent, extensive or inflamed disease needs paediatric review. Severe, widespread or recurrent disease should prompt confirmation of diagnosis, adherence, medicines, immunosuppression and referral needs.
Set a review point and one measurable goal, such as less itch or less scale. Treatment should be affordable and feasible in the patient’s setting, including rural or hot, humid Indian environments.
Prescribing Information
Prescribe by site, age, pregnancy or lactation status, severity, prior response, irritation risk and local availability. Antifungal shampoo or cream is generally the treatment foundation for typical seborrhoeic dermatitis, but exact strength, contact time, frequency and duration must be taken from the current Indian product information. Explain that mild dryness or stinging can occur and that eyes and mucosa should be protected. Stop and seek review for marked swelling, blistering or suspected allergy.
A short course of a low-potency topical corticosteroid may be considered by a clinician for significant inflammatory flare, particularly on the scalp, but face, eyelids, groin and folds need extra caution. Avoid potent or prolonged facial steroid use because atrophy, telangiectasia, acneiform eruptions and steroid rosacea can follow. Do not give a dose schedule here because formulation, age, site and licensing change the risk. Topical calcineurin inhibitors may be considered as steroid-sparing therapy by clinicians familiar with their precautions; initial burning is common and infection or unusual lesions should be excluded.
Systemic antifungals are not routine self-treatment. They require diagnostic confidence, interaction review, liver-risk assessment and clinician monitoring. Avoid topical antibiotic combinations unless bacterial infection is separately diagnosed. Ask patients to bring every bottle, tube and online product to the appointment. Never imply that a branded product is superior or that an antifungal is needed indefinitely without reassessment.
Document counselling, pregnancy status when relevant, intended duration, maintenance plan, adverse-effect advice and the review date. A prescription is one part of a safe plan, not a substitute for confirming morphology.
When to Refer
Refer to dermatology when the diagnosis is uncertain, disease is severe or widespread, scalp disease causes scarring or significant alopecia, there is suspected sebopsoriasis, recurrent treatment failure despite an agreed and adherent plan, or steroid dependence. Referral is also appropriate for persistent facial disease, suspected contact allergy, procedural or specialist steroid-sparing treatment, and substantial psychosocial burden.
Infants need paediatric or dermatology review when the eruption is atypical, spreads beyond expected seborrhoeic sites, persists with marked inflammation, bleeds, becomes infected, affects growth or is accompanied by fever, lethargy or poor feeding. Consider urgent review for extensive blistering, erythroderma, rapidly progressive swelling or systemic illness.
Arrange appropriate sexual-health, infectious-disease or primary-care assessment when severe or sudden disease sits alongside weight loss, recurrent infections, oral candidiasis, lymphadenopathy or other HIV indicators. Testing should be confidential, consent-based and linked to counselling and confirmatory pathways.
Refer urgently for eye pain, photophobia, visual change or a painful swollen ear; these are not routine scale symptoms. A lesion that is ulcerated, bleeding, scarring, unilateral and progressive, or suspicious for malignancy needs prompt diagnostic assessment rather than another empiric cream.
Red Flags
Urgent assessment is warranted for fever or an unwell infant, rapidly spreading redness, extensive blistering, facial or airway swelling, severe pain, pus with systemic symptoms, erythroderma, dehydration or rapidly progressive skin loss. Secondary infection can complicate scratching and fissures, but do not assume infection whenever a flare looks dramatic.
Diagnostic red flags include unilateral annular facial disease, broken hairs or boggy scalp swelling, scarring alopecia, thick plaques with nail changes, mucosal lesions, photosensitive scarring, palpable purpura and lesions that bleed or ulcerate. Consider tinea, psoriasis, lupus, inflammatory or neoplastic disease and obtain targeted tests or referral.
In an infant, persistent widespread crusting, haemorrhagic papules, poor growth, hepatosplenomegaly or recurrent infections should prompt consideration of immunodeficiency or Langerhans cell histiocytosis. Severe sudden-onset adult disease, extensive refractory rash or accompanying HIV indicators merits confidential evaluation; it is not a reason to stigmatise the patient.
Medication red flags include facial use of potent steroids, prolonged unsupervised combination creams, worsening after multiple products, eye exposure, allergy, pregnancy or lactation concerns, and systemic antifungal use without interaction or liver review. Safety-net every patient with the change that should trigger reassessment.
Indian Clinical Context
In India, heat, humidity, sweating, commuting, helmets and occlusive cosmetics may make symptoms more noticeable, but they are not universal causes. Encourage practical measures such as a tolerable cleansing routine, drying skin folds, shade and a locally available medicated product rather than expensive cosmetic packages. Ask how the patient washes hair, what oils or home remedies are applied and whether access or cost makes the proposed maintenance plan unrealistic.
Brown skin may show less obvious erythema and more persistent post-inflammatory hyperpigmentation or hypopigmentation. Ask about burning, itch, scale and colour change and assess in consistent light. Explain that pigment often settles more slowly than active inflammation; avoid unverified bleaching products and steroid combinations. Coconut or other hair oil is culturally meaningful. If used, recommend brief pre-wash application only when tolerated and emphasize thorough washing; it does not replace antifungal treatment.
Over-the-counter steroid combinations are a major avoidable hazard. Ask without judgement, identify the active ingredients and make a supervised withdrawal and alternative plan. Drug choices must use current Indian product information, NMC teaching standards, pregnancy considerations and local availability; do not promise a particular brand or specialist service. Severe or resistant disease should trigger confidential HIV assessment where clinically indicated, following NACO-linked local pathways and consent.
Primary care can often diagnose and manage uncomplicated disease, while referral capacity varies. Give written instructions in a language the patient understands, a maintenance plan and a clear return pathway. This guide supports NMC learning in morphology, rational prescribing, stigma-free communication and timely referral; it is not a substitute for local policy.
NMC Competency Mapping
This topic supports supervised NMC-aligned learning in Dermatology, Pharmacology, Paediatrics, Medicine, Community Medicine and AETCOM. Learners should describe seborrhoeic distribution and scale, distinguish dandruff from inflammatory disease, and examine brown skin without making erythema visibility a prerequisite. They should take a product and exposure history, identify when contact dermatitis, psoriasis, tinea or HIV-associated disease is plausible, and select focused rather than indiscriminate investigations.
A prescribing station can ask the learner to match an antifungal formulation to scalp, face or trunk; counsel about contact time, irritation, adherence and maintenance; and explain why potent facial steroids and unreviewed combination creams are unsafe. The learner should check age, pregnancy or lactation, drug interactions and local product information before recommending therapy.
A paediatric station should recognise ordinary cradle cap, demonstrate gentle scale care and identify systemic or atypical features needing referral. An AETCOM station should test non-stigmatising HIV counselling, confidentiality, consent and respect for cultural hair practices.
Exact competency codes and assessment levels vary by current institutional ledger and must be verified rather than invented. The safe educational endpoint is phenotype-led care, rational topical therapy, follow-up and escalation when the pattern does not fit.
Key Exam Pearls for NEET PG
Seborrhoeic dermatitis is a chronic relapsing inflammatory response associated with Malassezia in sebaceous areas; it is not contagious and is not simply poor hygiene. Dandruff is the mild scalp-only end. Typical sites include scalp, hairline, eyebrows, glabella, nasolabial folds, retroauricular skin, beard, presternal chest and flexures.
Greasy or fine scale on an erythematous or pigment-altered base supports the diagnosis. Well-demarcated silvery plaques and nail pitting suggest psoriasis; annular or unilateral lesions suggest tinea; marked product-related itch suggests contact dermatitis. Scarring, ulceration, bleeding, mucosal disease, systemic features or failure of a coherent plan require reassessment. Typical disease is clinical; KOH, culture, biopsy and HIV testing are targeted, not automatic.
Antifungal shampoo or cream is the treatment foundation, with label-directed contact time and a maintenance plan. Mild anti-inflammatory treatment may be brief and supervised; potent or prolonged facial steroid use is unsafe. Infant cradle cap is usually self-limited, but persistent widespread or systemically unwell infants need review. Severe, sudden, widespread or refractory adult disease should prompt a sensitive assessment for immunosuppression or HIV indicators. In India, ask about steroid combinations, hair oils, pigment change and affordability.
Frequently Asked Questions
Is seborrhoeic dermatitis contagious or caused by poor hygiene?
No. It reflects an inflammatory response in susceptible skin and is not spread by sharing towels, combs or physical contact. Washing too harshly can irritate the barrier. Use a gentle, consistent routine and seek review if the morphology changes or treatment is not working.
Can I use a strong steroid cream on my face for a flare?
Do not self-treat facial seborrhoeic dermatitis with a potent steroid or an unlabelled combination cream. A clinician may select a brief low-potency anti-inflammatory option for a defined flare, while antifungal treatment addresses the usual foundation. Prolonged steroid use can cause atrophy, visible vessels, acneiform eruptions and steroid rosacea.
Does severe seborrhoeic dermatitis mean I have HIV?
No. Most seborrhoeic dermatitis is not due to HIV. Severe, sudden, widespread or treatment-resistant disease, especially with other indicators such as recurrent infections or weight loss, should prompt confidential clinician assessment and consent-based testing where appropriate. The rash alone is not a diagnosis.
How should an infant with cradle cap be cared for?
Cradle cap is usually self-limiting. Soften scale with a bland emollient, wash gently and use a soft brush without picking. Avoid essential oils and harsh products. Arrange paediatric review for fever, poor feeding, poor growth, bleeding, extensive or persistent rash, marked inflammation or disease outside the usual scalp and fold pattern.
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