What is scalp psoriasis?

According to the American Academy of Dermatology, scalp psoriasis is a chronic autoimmune skin condition where an overactive immune system causes skin cells to multiply too quickly and build up into itchy, reddish patches and silvery scales. It cannot be cured, but when treated, flare-ups are usually followed by remission, and symptoms may resolve and recur throughout a person's life.

While scalp psoriasis is neither contagious nor dangerous, it significantly affects the quality of life. Uncomfortable itching, which is the most common symptom, worsens sleep and concentration. Moreover, the scalp is highly visible and difficult to treat because of the presence of hair. Psoriasis on the scalp can therefore cause not only discomfort, but also cosmetic and social distress.

How common is scalp psoriasis?

According to a 2020 study on the epidemiology of psoriasis, this skin condition affects approximately 2–3% of the world population, with higher prevalence in high-income countries including Western and Central Europe. Notably, the scalp is the most frequently affected hard-to-treat area, with 43% of psoriasis patients reporting symptoms in this location.

Who is affected by scalp psoriasis?

Psoriasis on the head can affect anyone. However, the above-mentioned study on the national, regional, and worldwide epidemiology of psoriasis showed significant differences in psoriasis distribution across regions and age groups. According to available data, it is most common in adults from high-income countries, and the incidence does not vary by sex.

What does scalp psoriasis look and feel like?

Scalp psoriasis causes distinct, raised patches and silvery-white scales. The colour of the patches varies by skin tone: they can be pink, red, or salmon on lighter skin, and purple or brown on darker skin. The scales on the patches resemble dandruff but are thicker and can build up into a crust.

The most common and often most bothersome symptom is itching, which can range from mild to severe. Other symptoms include tenderness and burning. Dryness and scratching can lead to cracking, bleeding, and in severe cases temporary hair loss.

Not sure if you are experiencing psoriasis on the scalp or dandruff? Read our comparison.

Common symptoms of scalp psoriasis

• Pink, red or brown raised patches on the scalp
• Thick, silvery or white scales
• Itching and burning
• Dryness and skin cracks
• Hair shedding

Where does scalp psoriasis typically appear?

Scalp psoriasis usually affects the skin around the ears, at the back of the head and along the hairline, but it can spread across larger sections of the scalp, such as the neck or forehead. In severe cases, thick scaling may affect most or all of the scalp.

Is scalp psoriasis contagious?

No. Scalp psoriasis is not contagious and cannot be passed to another person through physical contact or shared items.

What causes scalp psoriasis?

Psoriasis is an autoimmune disease, and its cause is not fully understood. Yet, there is a broad scientific consensus that the immune system and heritability play a significant role.

What is the role of the immune system in scalp psoriasis?

In psoriasis patients, the immune system incorrectly identifies healthy skin cells as dangerous, and white blood cells called T-cells become mistakenly activated. These cells travel to the outer layers of the skin, release inflammatory proteins and trigger a cycle of chronic inflammation, which causes skin cells to divide and grow at an abnormal rate.

Therefore, psoriasis treatments often focus on suppressing or re-regulating this specific immune activity.

Is psoriasis genetic?

Yes, psoriasis is highly hereditary. According to the National Psoriasis Foundation's Psoriasis Health Indicator Report, if both parents have psoriasis, the risk of developing it is about 40–65%. However, genes are not the only risk factor.

How is scalp psoriasis diagnosed?

The patient journey usually starts with symptoms confusion, as scalp psoriasis can be easily mistaken for other skin conditions, such as dandruff, seborrhoeic dermatitis, or eczema.

Psoriasis on the scalp is diagnosed by a dermatologist, who examines the appearance of the skin, the location of the patches, and other symptoms such as itching. If the diagnosis is not clear after the visual inspection, a skin biopsy might be needed to exclude other possible skin conditions.

Diagnosis is followed by medical intervention to control the acute flare-up. After the treatment, the patient enters a maintenance phase, where proper scalp care and prevention play a crucial role.

How to manage scalp psoriasis day to day

Psoriasis on the head can be difficult to manage, because everyone responds differently to treatments, and they can stop working after repeated use. A daily routine therefore requires a holistic approach and should be based on three foundations:

• Prescription treatments for acute inflammation control
• Daily care for ongoing maintenance and symptom comfort
• Trigger avoidance to help prevent relapses

What is the role of daily care in scalp psoriasis?

Psoriasis is a chronic condition with recurring flare-ups, therefore consistent daily care serves as a crucial supportive measure to maintain scalp comfort between treatment phases and complement medical interventions.

While it cannot treat the underlying inflammation, an appropriate scalp care routine can help reduce scaling, dryness and itching, relieve discomfort, support the skin barrier, and improve the effectiveness of prescribed therapies. Using gentle, well-formulated products consistently can also make symptoms easier to manage and contribute to better long-term scalp health and quality of life.

Appropriate scalp care products can help prolong periods of remission, minimise irritation, and reduce the risk of triggering flare-ups.

How to choose cosmetic care products designed for psoriasis-prone scalps?

It is very beneficial to use hair and scalp cosmetics designed specifically for psoriasis-prone skin, when selected carefully.

Unlike generic scalp psoriasis shampoos, Nizoral® Care Kerato-PSO Shampoo contains 2% encapsulated salicylic acid, which allows for slower release of the active ingredient and provides long-lasting exfoliation without irritation. It provides a 76% visible reduction in scalp scale thickness after 4 weeks[1], and helps protect the scalp barrier and reduce dryness.

Moreover, Nizoral® Care Kerato-PSO Shampoo contains a range of components that help soothe the scalp from the first use[2], provide hydration and 24-hour itch relief[3], and support the natural scalp microbiome. Regular use can lead to up to 99% improvement in overall scalp condition in 4 weeks[4]. This multi-benefit shampoo is clinically tested for tolerance and use on a psoriasis-prone scalp, is pH-balanced (pH 5.0–6.0), and suitable for daily use.

How does psoriasis-specific scalp care differ from keratolytic products?

Psoriasis-specific scalp care is designed to address the characteristic features of scalp psoriasis, such as persistent scaling, dryness, itching, and a weakened skin barrier. These products typically combine gentle cleansing with moisturising ingredients and, in some cases, keratolytic agents that help soften and remove thick scales without excessive irritation.

By contrast, keratolytic products alone are intended mainly to loosen and remove excess scales. Although keratolytics can be a valuable part of psoriasis management, they do not address hydration or barrier support on their own. Psoriasis-specific care therefore provides a more comprehensive approach by combining scale management with ingredients that help soothe and protect the scalp.

Gentle scalp-care tips

• For washing, use warm rather than hot water.
• Massage the scalp gently and avoid scratching or picking at scales.
• Pat or gently squeeze the hair dry instead of rubbing it.
• Avoid very hot hairdryers and products that irritate your scalp.
• Follow the product instructions and any advice from your healthcare professional.

What are the most common scalp psoriasis triggers?

According to the National Psoriasis Foundation, flare-ups are commonly triggered by:

• Stress
• Certain medications
• Smoking tobacco
• Alcohol
• Injuries or trauma to the skin
• Illness, such as infections
• Changes in weather
• Certain dietary factors

When to consult a healthcare professional?

While mild symptoms can be relieved by following a daily routine, more serious conditions require medical attention.

Do not wait to seek care from your dermatologist if you are unsure about the diagnosis, experience severe symptoms, infection, fever, or the daily routine doesn't provide relief after 2–4 weeks. Your doctor can prescribe topical steroids or non-steroids, phototherapy, or systemic medications that suppress the immune response.

Sources

• BMJ: National, regional, and worldwide epidemiology of psoriasis
• PMC: Epidemiology of psoriasis in hard-to-treat body locations
• National Psoriasis Foundation: Scalp Psoriasis
• National Psoriasis Foundation: Psoriasis Health Indicator Report
• American Academy of Dermatology: Psoriasis
• The National Health Service (NHS): Psoriasis