Psoriatic arthritis is a chronic inflammatory condition that affects some people with psoriasis, a skin disorder characterized by red, scaly patches. This type of arthritis can cause pain, stiffness, and swelling in the joints, leading to discomfort and reduced mobility. It can affect any joint in the body, including fingers, toes, and the spine. The exact cause of psoriatic arthritis is not fully understood, but it is believed to involve a combination of genetic and environmental factors. Early diagnosis and treatment are important to manage symptoms and prevent joint damage. Common treatments include medications, physical therapy, and lifestyle changes.