Scalp Psoriasis

Scalp psoriasis is a non-contagious, chronic autoimmune disease that affects the skin on the scalp. It is a variant of plaque psoriasis, which is the most common form of psoriasis, affecting about 80% to 90% of people with the condition. Scalp psoriasis can occur as an isolated condition, or it can be a part of a broader psoriasis presentation on other areas of the body.

What Causes Scalp Psoriasis?

Psoriasis is an autoimmune disease, meaning the body's immune system mistakenly attacks healthy cells. In psoriasis, the immune system triggers an accelerated growth cycle of skin cells. Normally, skin cells mature and shed over a period of 28 to 30 days. In individuals with psoriasis, this process is dramatically sped up, occurring in just 3 to 4 days. This rapid turnover leads to a buildup of skin cells on the surface, forming the characteristic plaques.

The exact cause of this immune system dysfunction is not fully understood, but it is believed to be a combination of genetic predisposition and environmental triggers. Individuals with a family history of psoriasis are more likely to develop the condition.

Common triggers that can exacerbate or initiate a flare-up of psoriasis symptoms include:

• Stress: Psychological stress can significantly impact the immune system.
• Infections: Strep throat and other infections can sometimes trigger psoriasis or make existing psoriasis worse.
• Skin injury: Trauma to the skin, such as cuts, scrapes, or even severe sunburn, can induce psoriasis plaques at the site of injury, a phenomenon known as the Koebner phenomenon.
• Certain medications: Beta-blockers, lithium, and antimalarial drugs are known to worsen psoriasis in some individuals.
• Weather: Cold, dry weather can often exacerbate symptoms, while warm, humid conditions may offer some relief.
• Alcohol and smoking: Heavy alcohol consumption and smoking have been linked to an increased risk and severity of psoriasis.

Symptoms of Scalp Psoriasis

The symptoms of scalp psoriasis can range from mild to severe. In mild cases, it may present as slight scaling with minimal discomfort. In severe cases, it can cover the entire scalp, extend to the forehead, back of the neck, and behind the ears, and lead to intense itching and significant discomfort.

Key symptoms include:

• Red patches: Inflamed areas of skin that are often well-demarcated.
• Silvery-white scales: Thick, dry, and often crumbly scales that may resemble dandruff but are typically thicker and more adherent to the scalp.
• Dry scalp: The affected skin can be very dry, leading to cracking and bleeding, especially if scratched.
• Itching: This can range from mild to intense and can be a significant source of distress.
• Burning or soreness: The inflamed skin can be tender and painful.
• Temporary hair loss: While scalp psoriasis does not directly cause permanent hair loss, vigorous scratching, attempting to remove scales, or severe inflammation can lead to temporary hair shedding. The hair usually grows back once the condition is under control.

Diagnosis

Diagnosis of scalp psoriasis is typically made by a dermatologist or healthcare provider based on a physical examination of the scalp and a review of the patient's medical history. In some cases, a skin biopsy may be performed to confirm the diagnosis and rule out other conditions such as seborrheic dermatitis or fungal infections.

Treatment Approaches

Treatment for scalp psoriasis aims to reduce inflammation, slow down skin cell growth, and remove scales. The choice of treatment depends on the severity of the condition, its impact on the individual's quality of life, and their response to previous treatments. It is important to note that psoriasis is a chronic condition, and treatments manage symptoms rather than cure the disease.

Topical Treatments

These are often the first line of defense for mild to moderate scalp psoriasis.

• Corticosteroids: These anti-inflammatory medications reduce redness, itching, and scaling. They are available in various strengths and formulations (solutions, foams, gels, shampoos).
• Vitamin D analogues (e.g., calcipotriol): These compounds slow down skin cell growth. They can be used alone or in combination with corticosteroids. They are typically applied once or twice daily.
• Salicylic acid: This keratolytic agent helps to soften and loosen scales, making them easier to remove. It is often found in medicated shampoos and lotions.
• Coal tar: This ancient treatment helps to reduce inflammation, itching, and scaling. It is available in shampoos, creams, and ointments.
• Tazarotene: A topical retinoid that normalizes skin cell growth and reduces inflammation. It is often used in conjunction with corticosteroids.

Phototherapy

For more widespread or severe scalp psoriasis, phototherapy, specifically narrowband ultraviolet B (UVB) light, can be effective. This treatment involves exposing the scalp to controlled doses of UVB light, which slows the growth of skin cells. It typically requires multiple sessions per week over several weeks.

Systemic Medications

When topical treatments and phototherapy are insufficient, systemic medications that work throughout the body may be prescribed. These are typically reserved for moderate to severe cases.

• Oral medications (e.g., methotrexate, cyclosporine, apremilast): These drugs suppress the immune system or target specific pathways involved in inflammation. They require careful monitoring due to potential side effects.
• Biologic drugs: These are advanced medications administered by injection or infusion. They target specific parts of the immune system involved in psoriasis development. Biologics are typically used for severe psoriasis that has not responded to other treatments.

Haircare and Lifestyle Management

Managing scalp psoriasis also involves careful haircare and lifestyle adjustments:

• Gentle hair washing: Use mild, fragrance-free shampoos. Avoid harsh scrubbing that can irritate the scalp.
• Avoid scratching: While tempting, scratching can worsen irritation, lead to infections, and contribute to temporary hair loss.
• Moisturize: Regularly moisturizing the scalp, especially after washing, can help reduce dryness and flaking. Products containing ingredients like aloe vera or ceramides can be beneficial.
• Stress management: Techniques such as meditation, yoga, or deep breathing can help reduce stress, which is a known trigger.
• Diet: While there is no specific "psoriasis diet," some individuals find that avoiding certain foods (e.g., processed foods, excessive sugar, alcohol) or incorporating anti-inflammatory foods (e.g., omega-3 fatty acids) can help manage their symptoms.
• Hair styling: Avoid tight hairstyles, excessive heat styling, and harsh chemical treatments that can irritate the scalp.

Scalp Psoriasis vs. Seborrheic Dermatitis

It is common to confuse scalp psoriasis with seborrheic dermatitis due to overlapping symptoms like flaking and itching. However, there are key differences:

Feature	Scalp Psoriasis	Seborrheic Dermatitis
Appearance	Thick, silvery-white scales; well-demarcated red patches	Yellowish, greasy scales; less distinctly red patches
Location	Scalp, often extends beyond hairline	Scalp, eyebrows, sides of nose, ears, chest
Itching	Often intense	Can be itchy, but often less severe than psoriasis
Skin Feel	Dry, sometimes cracked and bleeding	Oily, sometimes inflamed
Associated Organs	Autoimmune condition, can affect joints (psoriatic arthritis)	Fungal overgrowth (Malassezia yeast) plays a role

Conclusion

Scalp psoriasis is a manageable condition, though it requires ongoing care. Understanding its nature as an autoimmune disorder and working closely with healthcare professionals to develop a personalized treatment plan is crucial for controlling symptoms and improving quality of life. Consistent adherence to treatment and proactive lifestyle management are key to minimizing flare-ups and maintaining scalp health.

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Find these ingredients in Watermans products

• Vitamin D — you will find this ingredient in our Hair Vitamins.
• Aloe Vera — you will find this ingredient in our Curly Hair Conditioner.