Overview

Psoriasis is a chronic immune-mediated skin disorder that accelerates the life cycle of skin cells. This rapid turnover causes thickened, red patches covered with silvery scales. It commonly affects the scalp, elbows, knees, and lower back, but it can appear anywhere on the body. The condition is not contagious and tends to follow a pattern of flare-ups and remission. Psoriasis may vary from mild localized patches to widespread skin involvement. In some individuals, it may also affect the nails and joints. The disease can significantly impact physical comfort and emotional well-being. Environmental factors and immune responses play a major role in disease activity. Symptoms may worsen during stress or illness. Long-term monitoring is often required.

What Happens During Allergic Rhinitis?

In psoriasis, the immune system triggers inflammation that speeds up skin cell production. Normally, skin cells renew every few weeks, but in psoriasis, they accumulate within days. This buildup forms thick plaques on the surface of the skin. The inflamed areas may become itchy, cracked, or painful. In some cases, joints may also become inflamed (psoriatic arthritis).

Diagnosis

Diagnosis is usually based on physical examination of skin lesions. A dermatologist evaluates the appearance and distribution of plaques. In uncertain cases, a skin biopsy may be performed. Additional evaluation may be required if joint symptoms are present.