Psoriasis is a chronic autoimmune skin condition characterized by the rapid buildup of skin cells. It causes thick, red, and scaly patches to develop on the skin, which can be itchy, painful, and sometimes accompanied by inflammation.

The exact cause of psoriasis is not fully understood, but it is believed to involve a combination of genetic, immune system, and environmental factors. In psoriasis, the immune system mistakenly triggers an inflammatory response, leading to an accelerated production of skin cells. This abnormal cell turnover results in the formation of thickened patches or plaques on the skin surface.

Symptoms of psoriasis can vary from person to person and may include:

Red, raised patches of skin with a silvery-white scale.
Dry, cracked skin that may bleed.
Itching, burning, or soreness in affected areas.
Thickened, pitted, or ridged nails.
Joint pain or stiffness (psoriatic arthritis), which can occur in some individuals.