Seborrheic Dermatitis (Dandruff): Symptoms, Causes, Diagnosis & Treatment — Complete Guide

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 17, 2026

Quick Answer

Seborrheic dermatitis is a common skin condition that mainly affects the scalp, causing scaly patches, inflamed skin and stubborn dandruff, and it also targets oily areas such as the face, eyebrows, ears and chest. It is not contagious and does not cause permanent hair loss. It may clear on its own, or medicated shampoo may be needed long term.

What the research says

• About 1 in 23 people worldwide has seborrheic dermatitis. A meta-analysis of 121 studies covering 1,260,163 people found a pooled global prevalence of 4.38% (95% CI 3.58% to 5.17%), higher in adults (5.64%) than in children (3.70%) or neonates (0.23%). (Polaskey et al., JAMA Dermatol, 2024) [3]

• An antifungal cream beat several other topical treatments in a pooled analysis. A meta-analysis of 8 controlled trials found that at 28 days, sertaconazole 2% cream was linked to a higher share of patients with mild disease scores and a lower share with moderate or severe scores than hydrocortisone, ketoconazole, clotrimazole, metronidazole, pimecrolimus, or tacrolimus. (Georgescu et al., J Pers Med, 2022) [4]

• A calcineurin inhibitor cream controlled facial symptoms with fewer relapses. A systematic review of 5 randomized trials (4 included in the meta-analysis) found pimecrolimus 1% cream effectively controlled facial seborrheic dermatitis with lower relapse rates, though side effects were more frequent than with other topical treatments (mild and tolerable). (Alsmeirat et al., Cureus, 2022) [5]

• Ketoconazole 2% shampoo outperformed zinc pyrithione 1% in severe dandruff. In a randomized trial of 331 eligible people with severe dandruff or seborrheic dermatitis (171 on ketoconazole 2%, 160 on zinc pyrithione 1%), ketoconazole achieved a 73% improvement in the total dandruff severity score versus 67% for zinc pyrithione at week 4, and the recurrence rate was significantly lower with ketoconazole. (Piérard-Franchimont et al., Skin Pharmacol Appl Skin Physiol, 2002) [6]

• A follow-up shampoo helps keep flakes down after the first month. In 68 people with mild-to-moderate scalp seborrheic dermatitis treated for one month with 2% ketoconazole (which significantly reduced Malassezia), a 2-month maintenance phase with a 1% selenium disulfide shampoo gave additional improvement in adherent and non-adherent flakes compared with a vehicle shampoo at day 84 (p = 0.0002 and p = 0.0081). (Massiot et al., J Cosmet Dermatol, 2022) [7]

• Malassezia is only part of the picture. A clinical review describes seborrheic dermatitis as a chronic inflammatory disorder in which Malassezia yeasts, along with genetic, environmental and general health factors, contribute; scalp involvement ranges from mild dandruff to dense, adherent scale, and options include selenium sulfide, pyrithione zinc or ketoconazole shampoos and topical corticosteroids. (Johnson & Nunley, Am Fam Physician, 2000) [8]

Seborrheic Dermatitis at a Glance

Question	Answer
What is it?	A rash of oily patches with flaky white or yellow scales (dandruff)
Is it contagious?	No
Does it cause hair loss?	Not permanent
Where does it appear?	Scalp, face, sides of nose, eyebrows, ears, eyelids, chest
What may cause it?	Malassezia yeast, excess skin oil, or an immune system problem
What triggers flare-ups?	Stress, fatigue, change of season
Who is at higher risk?	People with Parkinson's, depression, HIV, or recent recovery from major illness
How is it diagnosed?	Skin exam and symptom discussion; skin biopsy to rule out other conditions
Does it come back?	Often — long-term maintenance is usually needed

What Is Seborrheic Dermatitis?

Seborrheic dermatitis is a common skin condition that mainly affects your scalp. It causes scaly patches, inflamed skin, and stubborn dandruff. It usually affects oily areas of the body — the face, sides of the nose, eyebrows, ears, eyelids, and chest.

The condition is irritating but not contagious, and it doesn't cause permanent hair loss. It may go away without treatment — or you may need to use medicated shampoo or other products long term to clear up symptoms and prevent flare-ups.

You may already know it by other names: dandruff, seborrheic eczema, and seborrheic psoriasis. When it occurs in infants, it's called cradle cap.

What are the symptoms of seborrheic dermatitis?

Signs and symptoms of seborrheic dermatitis may include:

Symptom	Details
Flaking skin (dandruff)	On the scalp, hair, eyebrows, beard, or mustache
Greasy patches with flaky scales or crust	White or yellow scales on the scalp, face, sides of the nose, eyebrows, ears, eyelids, chest, armpits, groin area, or under the breasts
Rash appearance varies by skin tone	May look darker or lighter in people with brown or Black skin; redder in those with white skin
Ring-shaped rash	In a type called petaloid seborrheic dermatitis
Itchiness (pruritus)	Varies from mild to intense

Importantly, the signs and symptoms tend to flare with stress, fatigue, or a change of season.

When to See a Doctor

See your healthcare provider if:

• You're so uncomfortable that you're losing sleep or are distracted from your daily routines

• Your condition makes you feel embarrassed or anxious

• You think your skin is infected

• You've tried self-care steps, but your symptoms persist

What causes seborrheic dermatitis?

The exact cause of seborrheic dermatitis isn't clear. It may be due to:

• The yeast __Malassezia__, a microbe that lives on skin

• Excess oil in the skin

• A problem in the immune system

These factors are thought to combine in the oily zones where the condition strikes — but no single cause has been confirmed.

What raises the risk of seborrheic dermatitis and triggers flares?

Signs and symptoms tend to flare with stress, fatigue, or a change of season. Risk factors for seborrheic dermatitis include:

• Nervous system conditions, such as Parkinson's disease

• Mental health conditions, such as depression

• Immune system disorders, such as HIV infection

• Recovery from stressful medical conditions, such as a heart attack

What complications can uncontrolled seborrheic dermatitis cause?

While seborrheic dermatitis is not dangerous, uncontrolled symptoms can lead to significant discomfort, sleep loss, and emotional distress — embarrassment and anxiety are common, and scratched or picked skin raises the risk of infection. That's why catching flare-ups early and staying on a maintenance routine matters.

How is seborrheic dermatitis diagnosed?

To diagnose seborrheic dermatitis, your healthcare provider will likely talk with you about your symptoms and look at your skin. You may need to have a small piece of skin removed (biopsied) for study in a lab — this test helps rule out other conditions such as psoriasis or eczema that can look similar.

What treatments help seborrheic dermatitis?

For adolescents and adults, the main treatments are medicated shampoos, creams, and lotions. If nonprescription products and self-care habits don't help, your provider might suggest one or more of these treatments:

Treatment	How It Works and Key Notes
Antifungal gels, creams, lotions, foams, or shampoos	Products with 2% ketoconazole or 1% ciclopirox (Loprox); you might rotate between two or more products. Leave the product on your scalp for a few minutes, then rinse. After symptoms clear, use a medicated shampoo once a week or once every two weeks to prevent relapse. Note: ketoconazole can worsen dryness of tightly coiled or chemically treated hair — use it only once a week with a moisturizing conditioner
Anti-inflammatory creams, lotions, shampoos, or ointments	Prescription corticosteroids applied to the scalp or affected area — hydrocortisone, fluocinolone (Capex, Synalar), clobetasol (Clobex, Temovate), desonide (Desowen, Desonate). Use only until symptoms clear: long-term continuous use can cause loss of skin color, thinning skin, and streaks or lines. Creams with a calcineurin inhibitor such as tacrolimus (Protopic) or pimecrolimus (Elidel) have fewer side effects, but are not first-choice treatments because of FDA concerns about a possible cancer association, and they cost more
Oral antifungal pills	For cases that aren't improving with other treatments or are severe

What lifestyle and home remedies help control seborrheic dermatitis?

You may be able to control seborrheic dermatitis with lifestyle changes and home remedies. Many of these are sold over the counter. You may need to try different products — or a combination — before your condition improves. The best approach depends on your skin type, hair-grooming practices, and symptoms.

Even if your condition clears up, it's likely to come back at some point. Watch for symptoms and resume treating when it recurs — or use nonprescription antidandruff products in your self-care routine to prevent flare-ups.

Wash Your Scalp Regularly

If regular shampoo doesn't help with dandruff, try nonprescription dandruff shampoos, classified by active ingredient:

Active Ingredient	Examples	Notes
Pyrithione zinc	DermaZinc, Head & Shoulders	Also sold as bar soap
Selenium sulfide	Head & Shoulders, Selsun Blue	Can discolor light-colored hair
Ketoconazole 1%	Nizoral A-D	Also sold at prescription strength (2%)
Tar	Denorex Extra Strength, DHS Tar	Can discolor light-colored hair
Salicylic acid	Denorex, DHS Sal	Helps lift and loosen scales

Use medicated shampoos once a day or two to three times a week for several weeks. Be sure to leave the shampoo on for the full recommended time so the ingredients can work, then rinse. After symptoms clear, switch to once a week or once every two weeks to prevent relapse. If a shampoo that once helped loses its effectiveness, alternate between two or more types. These shampoos can also be rubbed gently on the face, ears, and chest and rinsed off well.

Other Home Remedies

Self-Care Step	How to Do It
Soften and remove scales from your hair	Apply mineral oil, peanut oil, or olive oil to your scalp; leave for 1–3 hours, then comb or brush your hair and wash it
Wash your skin regularly	Warm — not hot — water with a gentle soap or nonsoap cleanser; rinse thoroughly; pat dry; apply moisturizer while skin is still damp
Apply a medicated cream	First try a mild corticosteroid cream, foam, ointment, or oil (Scalpicin Scalp Itch), keeping it away from the eyes; if that doesn't work, try ketoconazole antifungal cream
Skip styling products	Stop hair sprays, gels, and other styling products while treating the condition
Avoid alcohol in products	Skin and hair products containing alcohol can cause flare-ups
Shampoo facial hair regularly	Seborrheic dermatitis can be worse under mustaches and beards — shampoo with 1% ketoconazole daily until symptoms improve, then weekly or biweekly; shaving might ease symptoms too
Clean your eyelids gently	If inflamed or scaly, wash each night with a few drops of baby shampoo mixed with two capfuls of warm water; wipe scales with a cotton swab; warm damp cloths pressed to the eyelids also help
Gently wash a baby's scalp	For mild cradle cap: wash once a day with mild baby shampoo; loosen scales with a cloth or infant hairbrush before rinsing. If scaling persists, apply mineral or olive oil first for 1–2 hours. Cradle cap usually disappears in a few weeks or months

In the Meantime, Before Your Appointment

A nonprescription antifungal or anti-itch cream can be helpful. If your scalp is affected, a nonprescription antifungal shampoo, foam, or other product may ease symptoms. Try not to scratch or pick at the affected area — it increases your risk of infection.

Do alternative medicine treatments work for seborrheic dermatitis?

Several alternative therapies have helped some people manage seborrheic dermatitis, but evidence for their effectiveness isn't proved — always check with your healthcare provider before adding them:

• Tea tree oil. A shampoo with 5% tea tree oil may be used on the affected area. Some studies suggest tea tree oil can trigger an allergic reaction.

• Aloe. Apply aloe vera gel to the affected area — from a product or directly from the leaf of an aloe plant.

If you're considering dietary supplements or other alternative therapies, discuss the pros and cons with your provider.

How should you prepare for a seborrheic dermatitis appointment?

You'll probably first visit your primary care provider, or a dermatologist (a skin conditions specialist). Before your appointment, prepare answers to:

• What are your symptoms, and when did they start?

• Does anything seem to trigger your symptoms?

• What medications are you taking — including creams or ointments?

• What treatments have you tried, and has anything helped?

Your provider is likely to ask how severe your symptoms are (steady, worsening, or up and down), whether they affect your sleep and quality of life, how often you use at-home treatments, what seems to help or make things worse, and whether you've been under stress or experienced major life changes.

What are common questions about seborrheic dermatitis?

Seborrheic dermatitis is a common, non-contagious skin condition that mainly affects the scalp and oily areas of the body, causing scaly patches, inflamed skin and stubborn dandruff.

What is seborrheic dermatitis?

Seborrheic dermatitis is a common skin condition that mainly affects the scalp and oily areas of the body, causing scaly patches, inflamed skin, and stubborn dandruff. It is not contagious and does not cause permanent hair loss. It is also called dandruff, seborrheic eczema, or seborrheic psoriasis.

What causes seborrheic dermatitis?

The exact cause isn't clear. It may be due to the yeast Malassezia, excess oil in the skin, or a problem in the immune system. Symptoms tend to flare with stress, fatigue, or a change of season.

Where does seborrheic dermatitis appear?

It usually affects the scalp, face, sides of the nose, eyebrows, ears, eyelids, and chest, and can also appear on the armpits, groin area, and under the breasts. In infants, it appears on the scalp as cradle cap.

Is seborrheic dermatitis the same as dandruff?

Yes — dandruff is one of the names for seborrheic dermatitis. When it occurs in infants, it is called cradle cap. It can also be called seborrheic eczema or seborrheic psoriasis.

What is the best treatment for seborrheic dermatitis?

The main treatments for adolescents and adults are medicated shampoos, creams, and lotions — typically antifungal products like ketoconazole, corticosteroid creams for inflammation, or oral antifungal pills for severe cases. After symptoms clear, using a medicated shampoo once a week or every two weeks helps prevent relapse.

Why does my dandruff shampoo stop working?

Sometimes a shampoo that helped loses its effectiveness over time. If that happens, alternate between two or more types of medicated shampoo, and be sure to leave it on the scalp for the full recommended time so the ingredients can work.

Will seborrheic dermatitis ever go away for good?

It may clear without treatment, but even after it clears, it's likely to come back at some point. The most reliable approach is to watch for symptoms and resume treatment when it recurs, or to keep a nonprescription antidandruff product in your ongoing self-care routine.

Conclusion

Seborrheic dermatitis is a condition defined by one word: stubborn — but it is manageable:

• Know your oily zones. Scalp, sides of the nose, eyebrows, ears, eyelids, beard, chest — that's where the flaky, greasy patches live. Finding them early is half the battle.

• Shampoos are your front line. Pyrithione zinc, selenium sulfide, ketoconazole, tar, and salicylic acid each attack the problem differently — and if one fades, rotate to another.

• Maintenance beats cure. This condition tends to return. Weekly medicated shampoo, gentle skin habits, and early treatment of flare-ups keep it quiet far more reliably than any one-time fix.

If you're dealing with dandruff that won't quit, or flaky scales that spread beyond the scalp, it's worth a proper diagnosis — other conditions can look similar. For other skin conditions explained in plain language, read our
atopic dermatitis (eczema) complete guide and neurodermatitis complete guide, and explore more on the rinnit.com homepage.

Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about any medical condition.

References

1. Mayo Clinic Staff. Seborrheic dermatitis - Symptoms and causes. Mayo Clinic. July 19, 2024. https://www.mayoclinic.org/diseases-conditions/seborrheic-dermatitis/symptoms-causes/syc-20352710

2. Mayo Clinic Staff. Seborrheic dermatitis - Diagnosis and treatment. Mayo Clinic. July 19, 2024. https://www.mayoclinic.org/diseases-conditions/seborrheic-dermatitis/diagnosis-treatment/drc-20352714

3. Polaskey MT, et al. The Global Prevalence of Seborrheic Dermatitis: A Systematic Review and Meta-Analysis. JAMA Dermatol. 2024;160(8):846-855. PMID 38958996. https://doi.org/10.1001/jamadermatol.2024.1987

4. Georgescu SR, et al. A Meta-Analysis on the Effectiveness of Sertaconazole 2% Cream Compared with Other Topical Therapies for Seborrheic Dermatitis. J Pers Med. 2022;12(9):1540. PMID 36143325. https://doi.org/10.3390/jpm12091540

5. Alsmeirat O, et al. The Efficacy and Safety of Pimecrolimus in Patients With Facial Seborrheic Dermatitis: A Systematic Review of Randomized Controlled Trials. Cureus. 2022;14(8):e27622. PMID 36072203. https://doi.org/10.7759/cureus.27622

6. Piérard-Franchimont C, Goffin V, Decroix J, et al. A multicenter randomized trial of ketoconazole 2% and zinc pyrithione 1% shampoos in severe dandruff and seborrheic dermatitis. Skin Pharmacol Appl Skin Physiol. 2002;15(6):434-441. PMID 12476017. https://doi.org/10.1159/000066452

7. Massiot P, Clavaud C, Thomas M, et al. Continuous clinical improvement of mild-to-moderate seborrheic dermatitis and rebalancing of the scalp microbiome using a selenium disulfide-based shampoo after an initial treatment with ketoconazole. J Cosmet Dermatol. 2022;21(5):2215-2225. PMID 34416081. https://doi.org/10.1111/jocd.14362

8. Johnson BA, Nunley JR. Treatment of seborrheic dermatitis. Am Fam Physician. 2000;61(9):2703-2710, 2713-2714. PMID 10821151. https://pubmed.ncbi.nlm.nih.gov/10821151/