Psoriasis is a chronic skin disorder that affects millions of people across the globe. It is characterized by thick, red, scaly patches on the skin, usually on the elbows, knees, scalp, and face. It usually occurs when the skin's cells are replaced too quickly, creating a buildup of skin cells which cause the red patches and scaly appearance.

Psoriasis has no known cause but is thought to be related to heredity, stressful events, and dietary deficiencies. While it is not contagious, it can be hereditary and is more common in individuals of Caucasian race, with a higher prevalence being seen in people of Northern and Eastern European ancestry.

Psoriasis can be mild or severe, depending on the extent of the condition. Symptoms can range from dry, scaly patches, to small silver-colored. The most common symptom is the formation of large, red, scaly patches covered with silvery scales that can become itchy and painful.

For mild cases of psoriasis, topical treatments such as creams, shampoos, and lotions are used. Corticosteroids, coal tar, retinoids, and calcipotriene are also used to reduce swelling, itching, and scaling. For more severe cases, ultraviolet light therapy, oral medications, and injectable medications may be necessary to slow or stop the growth of skin cells.

Dietary changes can also help reduce symptoms. People with psoriasis should avoid high-fat and spicy foods and eat more high-fiber fruits and vegetables to reduce inflammation. They should also avoid smoking, drinking alcohol, and eating processed foods.

Psoriasis is a difficult condition to live with and can cause physical and psychological distress. It is important for those affected to talk to their doctor and seek medical help if needed. With the proper treatment and lifestyle changes, it is possible to manage psoriasis and help alleviate symptoms.