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Psoriasis

Psoriasis is a chronic autoimmune inflammatory skin disease that produces thick, red, well-defined plaques topped with silvery-white scale, typically on the elbows, knees, scalp and lower back. It comes and goes in flares, can affect the nails and joints, and is not contagious.

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What Is Happening in Psoriatic Skin

Normally, a skin cell takes about a month to rise from the deeper layers to the surface and shed. In psoriasis, a misfiring immune system orders skin cells to multiply in just a few days. Immature cells pile up before they are ready, forming the thick plaque and scale that define the condition.

How does psoriasis develop?

Psoriasis is not a hygiene problem and it cannot be passed to others. It is an autoimmune condition with a strong genetic component, where the immune system mistakenly drives skin cells to renew far too fast. Specific factors can set off or worsen flares, and understanding them, including how skin injury fits in, helps explain why care is medical.

An Autoimmune Inflammatory Loop

At the root, T cells activate by mistake and release inflammatory messengers, led by IL-17 along with IL-23 and TNF, that order skin cells to multiply at high speed. Those skin cells in turn call in more immune cells, creating a self-sustaining inflammatory loop that keeps the plaques going rather than resolving.

Genetics and Common Flare Triggers

Psoriasis has a strong inherited component, so it often runs in families. Flares are commonly triggered by stress, infections such as strep throat, certain medications, alcohol, smoking and dry cold. Recognizing your personal triggers does not cure the condition, but it can help anticipate and reduce the frequency of flares.

The Köbner Phenomenon and Skin Injury

Psoriasis can appear on a patch of skin that has been injured, a response known as the Köbner phenomenon. This includes cuts and friction, but also aesthetic procedures that wound the skin, such as microneedling, ablative lasers and peels. For this reason, skin trauma is a key precaution for anyone living with psoriasis.

Different Types of Psoriasis

The most common form is plaque psoriasis. Others include guttate psoriasis with small drop-like lesions often following an infection, inverse psoriasis in skin folds, and rarer, more serious pustular and erythrodermic forms. A physician assesses the type and measures severity with medical tools such as the PASI score to guide care.

Environmental and lifestyle influences

Cold weather, smoking, alcohol consumption and certain infections or medications may worsen psoriasis symptoms. Environmental stressors and lifestyle-related inflammation can affect immune regulation and contribute to increased flare frequency or greater symptom severity over time.

How to Prevent

Work With a Dermatologist

Because psoriasis is autoimmune and chronic, it is diagnosed and followed medically. A physician or dermatologist tailors care to the type and severity, from topical options to phototherapy and modern medical therapies. Ongoing follow-up is what keeps the condition controlled over time, since it is managed rather than cured.

Manage Known Triggers

Limiting personal flare triggers, such as stress, smoking, alcohol and infections where possible, is a practical part of living with psoriasis. Supporting overall skin comfort with gentle, fragrance-free moisturizers can help, while keeping in mind that this supports comfort and does not treat the underlying condition.

Protect the Skin From Injury

Given the Köbner phenomenon, protecting psoriatic skin from trauma matters. Avoiding harsh friction, scratching and procedures that wound the skin helps reduce the chance of triggering new lesions. Any aesthetic treatment should be discussed in advance so precautions can be considered for your situation.

Reframe the Stigma

Psoriasis is not contagious and is not caused by anything you did. It is a recognized medical, autoimmune condition. Understanding this can ease the social weight that often comes with visible plaques, and it underlines why support and consistent medical care matter as much as the physical side.

Private Aesthetic Dermatology

Our private dermatology consultation, not covered by government insurance, is offered with or without a physician referral according to your province's regulations.

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