Psoriasis is a chronic autoimmune disorder that accelerates skin cell turnover, causing red, scaly patches. Affecting over 125 million people worldwide, its exact cause remains unknown, though genetics and environmental triggers play key roles. **Types of Psoriasis** Plaque Psoriasis**: Most common; thick, scaly patches on elbows, knees, and scalp. – Guttate Psoriasis**: Small, drop-like spots, often triggered by infections. – Inverse Psoriasis**: Smooth, red patches in skin folds, worsened by sweat and friction. – Pustular Psoriasis**: White pustules with inflamed skin, sometimes accompanied by fever. – Erythrodermic Psoriasis**: Rare and severe; widespread redness, peeling, and swelling, requiring urgent medical attention. Psoriasis can also impact nails, leading to thickening, discoloration, and detachment—often a sign of psoriatic arthritis