Psoriasis is more than a skin condition — it’s an autoimmune disorder that causes the rapid buildup of skin cells, leading to redness, itching, scaling, and sometimes painful inflammation. It’s a common, chronic disease that affects over 125 million people worldwide and about 8 million in the U.S. Genetics and environmental triggers both play key roles in its development.

There are five main types of psoriasis. Plaque psoriasis, the most common, appears as raised, scaly patches on the elbows, knees, scalp, and back. Guttate psoriasis mostly affects children and young adults, often triggered by infections like strep throat, and looks like small, teardrop-shaped spots. Inverse psoriasis hides in skin folds, appearing as smooth red patches worsened by friction and sweat.

Pustular psoriasis is less common but severe, causing pus-filled blisters that may be accompanied by fever or chills, requiring immediate medical attention. The rarest and most dangerous type is erythrodermic psoriasis, which causes widespread redness, peeling, and pain, and can be life-threatening without urgent care. Psoriasis can also affect nails, causing discoloration, pitting, or even detachment — sometimes signaling psoriatic arthritis.

Understanding psoriasis is key to managing it effectively. If you notice symptoms like scaly patches, unusual nail changes, or severe irritation, consult a dermatologist. With proper treatment and care, you can reduce flare-ups and improve your overall quality of life.