Scalp Psoriasis: Understanding the Condition and Managing Symptoms

CDM College Health Education Series

Scalp psoriasis is a common, long-term inflammatory skin condition that affects many Australians. It can cause persistent itching, redness, thick scaling, and discomfort, often affecting confidence and quality of life.

Although there is currently no cure, effective treatments are available to control symptoms and reduce flare-ups. This guide explains what scalp psoriasis is, what causes it, and how it can be managed.

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What is Scalp Psoriasis?

Scalp psoriasis is a form of psoriasis that affects the skin on the scalp. It occurs when the immune system becomes overactive, causing skin cells to grow much faster than normal. Instead of shedding naturally, these cells build up on the scalp, forming thick, inflamed, scaly plaques.

Scalp psoriasis may affect a small area or the entire scalp. In some people, it extends beyond the hairline onto the forehead, back of the neck, or around the ears.

Scalp psoriasis is not contagious. You cannot catch it from another person or spread it through touching, sharing hairbrushes, or close contact.

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Common Symptoms

Symptoms vary from mild to severe and may include:

• Thick white or silvery scales
• Red, inflamed patches of skin
• Persistent itching
• Burning or soreness
• Dry, cracked skin that may bleed
• Flaking that resembles dandruff
• Scales extending beyond the hairline
• Temporary hair shedding due to inflammation or scratching

Symptoms often improve and worsen in cycles, with periods of flare-ups followed by remission.

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What Causes Scalp Psoriasis?

The exact cause is unknown, but psoriasis is an immune-mediated inflammatory disease with a strong genetic component.

Several factors can trigger or worsen symptoms, including:

• Emotional stress
• Viral or bacterial infections
• Cold, dry weather
• Injury to the skin (scratching, cuts, or burns)
• Certain medications (such as lithium, some beta-blockers, and antimalarial medicines)
• Smoking
• Excessive alcohol intake
• Family history of psoriasis

Not everyone has the same triggers, so identifying your own can help reduce flare-ups.

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Is Scalp Psoriasis the Same as Dandruff?

No. Although both conditions can cause flaking, they are different.

Dandruff

• Fine white or yellow flakes
• Usually mild itching
• Little or no redness
• Caused by excess skin oil and yeast on the scalp

Scalp Psoriasis

• Thick silvery scales
• Well-defined red patches
• Moderate to severe itching
• May extend beyond the hairline
• Caused by an overactive immune system

If you are unsure which condition you have, your doctor can usually diagnose it by examining your scalp.

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How is Scalp Psoriasis Treated?

Treatment depends on the severity of the condition and how much of the scalp is affected.

1. Medicated Shampoos

Medicated shampoos help reduce scaling and inflammation.

Common ingredients include:

• Coal tar
• Salicylic acid
• Ketoconazole (particularly if dandruff or seborrhoeic dermatitis is also present)

These are usually used 2–3 times each week, following the instructions provided by your doctor or pharmacist.

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2. Topical Treatments

These medicines are applied directly to the scalp.

Your doctor may prescribe:

• Corticosteroid lotions, gels, foams, or scalp solutions
• Vitamin D analogues (such as calcipotriol)
• Combination products containing both a corticosteroid and vitamin D analogue

These treatments reduce inflammation, itching, redness, and scaling.

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3. Clobetasol Shampoo

For moderate to severe scalp psoriasis, your doctor may prescribe clobetasol propionate shampoo, a potent topical corticosteroid.

How to use Clobetasol Shampoo

• Apply up to 7.5 mL (or enough to cover the affected areas) once daily to a dry scalp.
• Gently massage the shampoo into the affected areas.
• Wash your hands after application.
• Leave the shampoo on the scalp for 15 minutes.
• Rinse thoroughly with water before using your usual shampoo if desired.
• Dry your hair as normal.

Important:

• Do not cover the scalp while the shampoo is in place unless instructed by your doctor.
• Rinse thoroughly before applying hair dye, as residue may affect colouring.
• Treatment is usually continued for the shortest duration needed, with a maximum recommended course of four weeks.
• Once symptoms improve, your doctor may advise reducing the frequency of use or changing to a maintenance treatment.

Always use this medication exactly as prescribed.

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4. Treatment for Severe Psoriasis

If scalp psoriasis is severe or does not respond to topical treatment, your dermatologist may recommend:

• Phototherapy (ultraviolet light therapy)
• Oral medications
• Biologic medicines (targeted immune therapies)

These treatments are usually reserved for moderate to severe psoriasis or when psoriasis affects multiple areas of the body.

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Looking After Your Scalp

Good scalp care can improve comfort and help treatments work more effectively.

Helpful Tips

✔ Wash your hair regularly using a gentle shampoo.

✔ Avoid scratching or picking at scales, as this may worsen inflammation and cause bleeding.

✔ Before washing, soften thick scales by applying coconut oil, olive oil, or a suitable emollient for several hours or overnight.

✔ Avoid harsh hair products and excessive heat from hair dryers.

✔ Manage stress through relaxation techniques, regular exercise, or mindfulness.

✔ Stop smoking and limit alcohol intake, as both are associated with more severe psoriasis.

✔ Moisturise dry skin around the hairline if needed.

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Possible Complications

Although scalp psoriasis is not dangerous, complications can include:

• Secondary skin infection
• Temporary hair loss due to inflammation
• Sleep disturbance from itching
• Reduced self-confidence
• Psoriatic arthritis, which causes painful, swollen, or stiff joints

Early treatment helps reduce these risks.

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When Should You See Your Doctor?

Arrange a medical review if:

• Your symptoms are worsening.
• Itching becomes severe or interferes with sleep.
• Thick scales do not improve despite treatment.
• You notice significant hair loss.
• Psoriasis spreads to your face, ears, or other parts of your body.
• You develop painful, swollen, or stiff joints.
• Your scalp becomes painful, warm, or develops pus, which may indicate infection.

Seek urgent medical attention if you develop widespread redness, fever, or signs of severe skin infection.

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What Is the Outlook?

Scalp psoriasis is a chronic condition, meaning it tends to come and go over time. Although there is no cure, most people achieve excellent symptom control with regular treatment, appropriate scalp care, and avoidance of known triggers.

Working closely with your GP or dermatologist can help you find the treatment plan that best suits your condition.

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Key Take-Home Messages

• Scalp psoriasis is a common inflammatory skin condition and is not contagious.
• It causes thick scales, redness, itching, and flaking.
• Treatment usually includes medicated shampoos and prescription topical medications.
• Clobetasol shampoo is an effective short-term treatment for moderate to severe scalp psoriasis when used as directed.
• Avoid scratching, keep the scalp moisturised, and identify personal triggers.
• Seek medical advice if symptoms persist, worsen, or if you develop joint pain.

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References

1. Australasian College of Dermatologists. Psoriasis. Available at: https://www.dermcoll.edu.au
2. DermNet NZ. Scalp Psoriasis. Available at: https://dermnetnz.org/topics/scalp-psoriasis
3. Australian Medicines Handbook. Clobetasol Propionate. Adelaide: Australian Medicines Handbook Pty Ltd.
4. MIMS Australia. Clobetasol Propionate Shampoo Product Information.
5. National Institute for Health and Care Excellence (NICE). Psoriasis: Assessment and Management (CG153). Available at: https://www.nice.org.uk/guidance/cg153
6. American Academy of Dermatology. Scalp Psoriasis: Diagnosis and Treatment. Available at: https://www.aad.org
7. Armstrong AW, Read C. Pathophysiology, Clinical Presentation and Treatment of Psoriasis. JAMA. 2020;323(19):1945–1960.
8. Griffiths CEM, Armstrong AW, Gudjonsson JE, Barker JNWN. Psoriasis. Lancet. 2021;397(10281):1301–1315.