Psoriatic arthritis (PsA) is a chronic inflammatory arthritis that can occur in people with psoriasis, a skin condition characterized by red, scaly patches. Psoriatic arthritis can affect the joints, causing pain, swelling, and stiffness. The progression of psoriatic arthritis can vary widely among individuals, and the disease can manifest in different stages. It's important to note that not everyone with psoriasis will develop psoriatic arthritis. The stages and progression of psoriatic arthritis may include the following: Early Stage: Mild Symptoms: In the early stages, individuals may experience mild symptoms, such as joint pain, swelling, and stiffness. Limited Joint Involvement: Initially, the arthritis may affect only a few joints, commonly the fingers or toes. Progressive Stage: Worsening Symptoms: Over time, the symptoms may progress and become more severe. Joint pain and swelling can increase, and stiffness may become more pronounced. Expanded Joint Involvement: The ar...