Psoriasis is a chronic autoimmune condition that affects approximately 2–3% of the UK population.
Unlike simple dry skin, psoriasis is caused by an accelerated skin regeneration process: where normal skin cells take weeks to replace themselves, psoriatic skin does so in just a few days.
This results in a buildup of cells that create the condition’s signature ‘plaques.’
Psoriasis symptoms can vary by type, but these five signs are the primary indicators of Plaque Psoriasis, the most common form:
Well-Defined Plaques: Raised, red patches of skin covered with silvery-white scales (micaceous scales).
Soreness or Burning: Unlike eczema, which is primarily itchy, psoriasis often feels like it is stinging or burning.
Dry, Cracked Skin that Bleeds: The skin may become so thick and dry that it cracks, especially around joints.
Nail Changes: Pitted, discolored, or crumbling fingernails and toenails (often mistaken for a fungal infection).
Extensor Rashes: Plaques typically appear on the outside of the elbows, knees, scalp, or lower back.
Psoriasis is an immune-mediated condition. While the exact cause isn’t fully understood, it involves:
Autoimmune Overactivity: T-cells (a type of white blood cell) mistakenly attack healthy skin cells.
Genetics: About one-third of people with psoriasis have a close relative with the condition.
Trigger Events: Flares are often set off by specific triggers, such as:
Stress: A leading cause of sudden flare-ups.
Skin Injury: Known as the Koebner phenomenon, where psoriasis develops at the site of a cut or scrape.
Infection: Strep throat is a common trigger for “Guttate” psoriasis.
Medications: Certain beta-blockers or lithium.
Identifying your specific type of psoriasis is essential for choosing the right treatment:
Plaque Psoriasis: The most common form (80-90% of cases), featuring raised, silvery scales.
Guttate Psoriasis: Small, drop-shaped sores, often appearing after a bacterial infection.
Inverse Psoriasis: Smooth, red patches found in skin folds (armpits, groin, under breasts).
Pustular Psoriasis: Characterized by white, non-infectious pus-filled blisters.
Erythrodermic Psoriasis: A rare, severe form that covers the entire body in a red, peeling rash. This requires immediate medical attention.
While psoriasis is a long-term condition, modern medicine offers highly effective ways to achieve clear skin:
1. Topical Treatments (First-Line)
Vitamin D Analogues: Creams that slow down the overproduction of skin cells.
Topical Corticosteroids: Used to reduce inflammation during active flares.
Coal Tar & Salicylic Acid: Effective for removing thick scales, particularly on the scalp.
2. Phototherapy (Light Therapy)
Controlled exposure to Ultraviolet B (UVB) light under medical supervision can significantly reduce plaques by slowing skin cell growth.
3. Systemic and Biological Medicines
For moderate to severe cases, doctors may prescribe oral medications or “biologics” (injections) that target the specific part of the immune system causing the inflammation.
Psoriasis is a systemic condition, meaning it can affect more than just your skin. See a GP if:
Joint Pain or Stiffness: Up to 30% of people with psoriasis develop Psoriatic Arthritis. Early diagnosis is vital to prevent permanent joint damage.
Extensive Coverage: If the plaques cover a large percentage of your body.
Widespread Redness: If you have a bright red rash that covers most of your body (Erythrodermic psoriasis), seek urgent care.
Emotional Impact: If the condition is causing significant anxiety, depression, or withdrawal from social activities.
| Feature | Psoriasis | Eczema |
| Borders | Sharply defined | Hazy, blended edges |
| Scaling | Silvery, thick scales | Flaky, thin scales |
| Location | Outside of joints (Extensor) | Inside of joints (Flexural) |
| Age of Onset | Typically 15–35 or 50–60 | Typically infancy or childhood |
10 Common Hair Problems – When to Worry and When to See a Doctor Here are 10 common hair problems, along with their descriptions, symptoms, and guidance on when to worry and see a doctor: 1. Dan...
10 Common Skin Problems – When to Worry and When to See a Doctor Here are 10 common skin problems, when to worry, and when to see a doctor. 1. Acne What it is: A common skin condition where hair...
Pemphigus and Pemphigoid: 5 Common Signs and When to See a Doctor Pemphigus and Pemphigoid are rare, serious autoimmune conditions that cause the body to attack its own skin and mucous membranes. Whil...
10 Common Skin Diseases – When to Worry and When to See a Doctor A Guide to Identifying Rashes, Infections, and Skin Emergencies Understanding your skin is the first step toward effective treatm...
