Medical Dermatology

Dandruff & seborrheic dermatitis

Persistent flaking and itching usually isn't dry scalp — it's often seborrheic dermatitis, driven by a common scalp yeast. A dermatologist can calm it and keep it under control.

Juniper Dermatology clinicians examining a patient's scalp for dandruff and seborrheic dermatitis in Bend, Oregon

Overview

Understanding dandruff

Close-up of seborrheic dermatitis — flaking and scale along the scalp and hairline with underlying redness
Seborrheic dermatitis shows up as flaking and scale — often greasy — with underlying redness of the scalp.

Dandruff and its more inflamed form, seborrheic dermatitis, cause flaking, itching, and redness on oil-rich skin — most often the scalp, but also the eyebrows, the creases beside the nose, the ears, the beard, and sometimes the chest. It's a chronic condition that tends to come and go, flaring with stress, cold or dry weather, and seasonal changes.

The key driver isn't poor hygiene — it's a yeast called Malassezia that lives on everyone's skin. In people prone to dandruff, this yeast feeds on scalp oils and leaves behind irritants that speed up skin-cell turnover, producing visible flakes and inflammation. Over-the-counter shampoos help many people, but stubborn, spreading, or facial cases respond best to a dermatologist-guided plan — including newer prescription options that weren't available even a few years ago.

What actually causes dandruff (it's not what most people think)

Dandruff has a real, treatable cause — and clearing up the myths is the first step to clearing your scalp:

  • It's driven by Malassezia, a yeast that naturally lives on skin — not by being 'dirty.' Dandruff is not caused by poor hygiene.
  • It's usually not simple dry scalp; in fact, over-washing or harsh products can make it worse, not better.
  • Oil-rich areas are most affected — scalp, brows, sides of the nose, ears, beard, and chest.
  • Flares are commonly triggered by stress, cold and dry weather, hormones, and certain medical conditions — which is why it keeps coming back without a real plan.

When over-the-counter shampoo isn't enough

Drugstore shampoos work for many people. See a dermatologist when they don't — or when it spreads beyond the scalp:

  • Flaking, itch, or redness that keeps returning despite regular medicated-shampoo use.
  • Scaly, red patches spreading to your face, eyebrows, ears, or beard.
  • A scalp that's inflamed, tender, weepy, or losing hair in the affected areas.
  • Thick, stubborn scale, or flaking in an infant (cradle cap) that concerns you.

Signs & symptoms

What we look for

Flaking

White or yellowish flakes on the scalp, hair, or shoulders — sometimes greasy rather than dry.

Itching

An itchy scalp that can be persistent or come in waves.

Redness & scale

Pink, scaly patches — often on the face, brows, sides of the nose, or ears.

Beard & chest

Flaking and redness can appear in the beard or on the mid-chest, not just the scalp.

Cradle cap in babies

Thick, yellow, scaly patches on an infant's scalp — a common, harmless form we can guide you through.

Recurring flares

Symptoms that improve, then return with stress, weather, or season changes.

How we treat it

Your treatment options

Seborrheic dermatitis is managed rather than cured — so we calm the current flare, then set up a simple, sustainable routine that keeps it away.

Prescription antifungal shampoos

Prescription-strength ketoconazole, ciclopirox, and selenium sulfide that go well beyond the drugstore aisle — targeting the Malassezia yeast at the root of the problem.

ZORYVE® (roflumilast) foam

A newer, steroid-free FDA-approved foam — the first new seborrheic dermatitis medication in two decades — that can ease itch within days and suits all hair types.

Salicylic acid for scale

Treatments to lift stubborn, built-up scale so the medicated products can actually reach the skin.

Topical anti-inflammatories

Short-term steroid and steroid-free (calcineurin-inhibitor) options to calm severe itching and redness, including on delicate facial skin.

Face & beard plan

Gentle, targeted care for seborrheic dermatitis around the nose, brows, ears, and beard — where scalp shampoos alone aren't the answer.

Maintenance routine

A simple, sustainable plan — often intermittent medicated shampoo — to keep flaking and itch from coming back.

When to see a dermatologist

If flaking and itching won't clear with over-the-counter shampoos, keep coming back, or are spreading to your face, brows, ears, or beard, a dermatologist can get it under control and keep it there.

Schedule with Juniper

Common questions

Dandruff FAQ

Is dandruff the same as dry scalp?

Usually not. Persistent flaking, itching, and redness are most often seborrheic dermatitis — an inflammatory condition driven by the Malassezia yeast — rather than simple dry scalp. That's why it responds to targeted antifungal and anti-inflammatory treatment rather than ordinary moisturizing, and why over-washing can actually make it worse.

What causes dandruff and seborrheic dermatitis?

The main driver is Malassezia, a yeast that naturally lives on everyone's skin. In people who are prone to it, the yeast feeds on scalp oils and leaves behind irritants that speed up skin-cell turnover, causing flaking and inflammation. It is not caused by poor hygiene. Stress, cold or dry weather, hormones, and certain health conditions can trigger flares.

What treatments actually stop dandruff?

We use prescription-strength antifungal shampoos (ketoconazole, ciclopirox, selenium sulfide), salicylic acid to lift stubborn scale, and anti-inflammatory topicals for redness and itch. For persistent cases we may add ZORYVE® (roflumilast) foam — a newer, steroid-free FDA-approved option — along with a maintenance routine to prevent flare-ups.

Can seborrheic dermatitis affect my face and beard?

Yes. It commonly shows up on the eyebrows, the creases beside the nose, the ears, the beard, and sometimes the chest. Facial and beard involvement needs a gentler approach than scalp shampoos alone, which is exactly the kind of plan a dermatologist tailors for you.

Will dandruff ever fully go away?

Seborrheic dermatitis is a chronic condition that's managed rather than permanently cured — but with the right plan it's very controllable. Most people get clear or nearly clear and stay that way with a simple maintenance routine.

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