Psoriasis: Causes, Symptoms and Treatment Options
Psoriasis is a chronic inflammatory skin condition causing scaly, red patches on the skin. It is not contagious and typically follows a relapsing-remitting course.
Wissenswertes über "Psoriasis"
Psoriasis is a chronic inflammatory skin condition causing scaly, red patches on the skin. It is not contagious and typically follows a relapsing-remitting course.
What is Psoriasis?
Psoriasis is a chronic, immune-mediated inflammatory skin disease affecting approximately 2–3% of the global population. It is characterized by an accelerated skin cell turnover, leading to the buildup of thick, silvery-white scales on red, inflamed skin patches known as plaques. The condition typically follows a relapsing and remitting course, with periods of flare-ups alternating with phases of little or no symptoms. Psoriasis is not contagious.
Causes
The exact cause of psoriasis is not yet fully understood, but it involves a complex interaction of genetic and immunological factors:
- Genetic predisposition: Psoriasis tends to run in families. Certain gene variants significantly increase the risk of developing the condition.
- Immune system dysregulation: The immune system mistakenly attacks healthy skin cells, triggering accelerated cell production and chronic inflammation.
- Trigger factors: Stress, infections (e.g., streptococcal throat infection), certain medications (e.g., beta-blockers, lithium), skin injuries, alcohol consumption, and smoking can provoke or worsen flare-ups.
Symptoms
Symptoms of psoriasis can vary depending on the type and severity of the condition. Common signs include:
- Well-defined, red skin patches (plaques) covered with silvery-white scales
- Itching, burning, or soreness of affected skin areas
- Commonly affected areas include elbows, knees, scalp, and lower back
- Nail changes such as pitting, thickening, or discoloration
- In psoriatic arthritis (affecting approximately 20–30% of patients): joint pain, stiffness, and swelling
Types of Psoriasis
There are several distinct types of psoriasis:
- Plaque psoriasis (Psoriasis vulgaris): The most common form, presenting with raised, inflamed plaques on extensor surfaces and the scalp
- Guttate psoriasis: Small, drop-shaped lesions, often triggered by bacterial infections
- Inverse psoriasis: Affects skin folds such as the armpits and groin
- Pustular psoriasis: Characterized by pus-filled blisters (pustules)
- Erythrodermic psoriasis: A severe, widespread form causing intense redness over large body surface areas
Diagnosis
Psoriasis is typically diagnosed through a thorough dermatological examination. In most cases, the clinical appearance alone is sufficient to confirm the diagnosis. Additional investigations may include:
- Skin biopsy: A small tissue sample is examined under a microscope to confirm the diagnosis
- Blood tests: To rule out other conditions and assess inflammatory markers
- Nail and joint assessment: If nail or joint involvement is suspected
Treatment
While there is currently no cure for psoriasis, effective treatments are available to control symptoms and improve quality of life. Treatment depends on the severity and extent of the disease:
Topical Therapy (mild to moderate psoriasis)
- Corticosteroids: Anti-inflammatory creams or ointments applied directly to the skin
- Vitamin D analogues (e.g., calcipotriol): Slow down the excessive growth of skin cells
- Calcineurin inhibitors: Suitable for sensitive areas such as the face
- Keratolytics (e.g., salicylic acid): Help remove and soften scales
Phototherapy
- Narrowband UVB therapy: Reduces excessive skin cell production
- PUVA therapy: Combines psoralen medication with UVA light exposure
Systemic Therapy (moderate to severe psoriasis)
- Methotrexate: Inhibits rapid skin cell proliferation
- Ciclosporin: Suppresses the overactive immune response
- Biologics (e.g., TNF-alpha inhibitors, IL-17 and IL-23 inhibitors): Targeted therapies that block specific inflammatory pathways
- Small molecules (e.g., apremilast): Oral treatment options with targeted mechanisms of action
General Measures
- Stress management and psychological support
- Regular use of emollients and moisturizing creams
- Identification and avoidance of known trigger factors
Living with Psoriasis
Psoriasis can have a significant impact on a person's quality of life, affecting both physical and mental well-being. Many individuals experience social stigma, reduced self-esteem, or depression. Support groups, psychological counseling, and open communication with healthcare providers are essential components of a holistic management approach.
References
- World Health Organization (WHO): Global Report on Psoriasis. Geneva: WHO Press, 2016.
- Nast A, Smith C, Spuls PI et al. - EuroGuiDerm Guideline on the systemic treatment of Psoriasis vulgaris. Journal of the European Academy of Dermatology and Venereology, 2020; 34(11):2461–2498.
- Griffiths CEM, Armstrong AW, Gudjonsson JE, Barker JNWN - Psoriasis. The Lancet, 2021; 397(10281):1301–1315.
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Related search terms: Psoriasis + Psorasis