Psoriatic arthritis
Psoriatic arthritis is an inflammatory joint disease associated with psoriasis that can affect joints, tendons, nails, the spine, and daily movement.
What psoriatic arthritis is
Psoriatic arthritis is a chronic inflammatory disease that affects some people with psoriasis. It is not simply joint pain from aging or overuse. The immune system drives inflammation that can involve joints, tendons, ligaments, the spine, nails, and skin.
Connection to psoriasis
Many people have psoriasis for years before joint symptoms begin, but the order is not always the same. Some people develop joint symptoms before obvious skin plaques, and others have mild skin disease but significant joint inflammation. Nail changes can be an important clue because nails and joint structures are closely related in psoriatic disease.
Symptoms
Symptoms vary widely. Common signs include painful or swollen joints, morning stiffness, fatigue, nail pitting or separation, lower back or neck stiffness, heel pain, and inflammation where tendons attach to bone. Dactylitis can make an entire finger or toe swell, creating a sausage-like appearance.
Patterns of joint disease
Psoriatic arthritis can affect a few joints or many joints. It may involve joints near the ends of fingers and toes, larger joints such as knees or ankles, the spine and sacroiliac joints, or tendon and ligament attachment sites. This variety can make diagnosis harder when symptoms do not follow a textbook pattern.
How it is diagnosed
Diagnosis usually combines medical history, skin and nail examination, joint examination, blood tests to rule out other conditions, and imaging such as X-rays, ultrasound, or MRI when needed. There is no single test that proves every case. Clinicians often look for the pattern of psoriasis, inflammation, joint symptoms, and exclusions.
Treatment goals
Treatment aims to reduce inflammation, control pain and stiffness, protect joints, preserve function, and manage skin and nail disease. Options can include physical activity guidance, topical skin treatments, anti-inflammatory medicines, disease-modifying medicines, biologic medicines, and care from dermatology or rheumatology specialists. The right plan depends on the person.
Living with the condition
Psoriatic arthritis can affect work, sleep, exercise, hand tasks, walking, mood, and social life. People may need to track flares, protect joints, keep appointments, report new symptoms, and coordinate care for both skin and joints. Because symptoms can come and go, stable periods do not always mean the disease is gone.
Why it matters
Psoriatic arthritis matters because skin disease and joint disease can be connected but easy to treat separately. Recognizing joint symptoms in someone with psoriasis can shorten the path to care, reduce damage risk, and help explain why psoriasis is more than a skin-deep condition.