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Overview

What Is Psoriatic Arthritis?

Psoriatic arthritis is a long-term inflammatory condition in which the immune system mistakenly attacks healthy tissues, causing pain, swelling, and stiffness in joints and tendons. It is linked with psoriasis, a condition that affects the skin and nails, and may also involve the spine. Psoriatic arthritis can affect adults or children, and it may occur with or without visible skin psoriasis.

Symptoms

Symptoms of Psoriatic Arthritis

  • Joint pain can affect the hands, feet, knees, or other joints.
  • Joint swelling may make an area look enlarged, feel warm, or become tender.
  • Morning stiffness can make it difficult to move after waking or resting.
  • Reduced range of motion may make everyday movements harder.
  • A whole swollen finger or toe (dactylitis) can look like a sausage-shaped digit.
  • Pain where a tendon attaches to bone (enthesitis) may occur at the heel, elbow, or other sites.
  • Lower-back or spinal stiffness can cause pain and reduced flexibility.
  • Raised, scaly skin patches (psoriasis plaques) may appear on the skin.
  • Nail pitting or separation of the nail from the nail bed can occur.

Causes

What Causes Psoriatic Arthritis?

Psoriatic arthritis develops when an overactive immune response causes inflammation in the joints, where tendons attach, and sometimes the spine and skin. The precise trigger is not fully understood; genes and other immune-related factors may play a role. Psoriatic arthritis is not caused by an infection, is not contagious, and is not a result of personal fault.

Risk Factors

Risk Factors for Psoriatic Arthritis

CANNOT CHANGE

Psoriasis, a family history of the condition, inherited genetic susceptibility, and age can be associated with a higher likelihood of developing psoriatic arthritis. A history of nail psoriasis or severe skin disease may also be relevant.

MAY BE MANAGEABLE

Obesity, smoking, and ongoing uncontrolled inflammation or severe psoriasis are associated with risk or disease burden. Addressing these factors may support overall health but does not prevent every case.

Having one or more risk factors does not guarantee that someone will develop psoriatic arthritis. People without obvious risk factors can still develop it, so new inflammatory joint symptoms should be assessed on their own merits.

Complications

Complications of Psoriatic Arthritis

  • Persistent inflammation can cause permanent joint damage and reduced mobility.
  • Severe disease may rarely lead to arthritis mutilans, a destructive form that can severely affect the fingers or toes.
  • Inflammation in the eye, such as uveitis, can cause pain, redness, and vision problems.
  • Psoriatic arthritis is associated with a higher risk of cardiovascular disease.
  • Related metabolic conditions may include obesity, diabetes, or abnormal cholesterol levels.
  • Ongoing pain and limits on daily activities can contribute to anxiety, depression, or social distress.
  • Spinal inflammation can lead to lasting stiffness and reduced function.

Protect your joints

Early care matters

Early evaluation and treatment can reduce inflammation and help prevent or limit joint damage. Seek prompt medical attention for urgent eye pain, marked eye redness, or vision changes.

Diagnosis

How Psoriatic Arthritis Is Diagnosed

  • A clinician reviews symptoms, personal psoriasis history, family history, and how the joint problems began.
  • The examination checks the joints, tendons, skin, and nails for signs of inflammation or psoriasis.
  • Blood tests can assess inflammation and help exclude conditions such as rheumatoid arthritis or infection.
  • X-rays or ultrasound can show joint changes, swelling, or inflammation around tendons.
  • MRI may be used when deeper joint, tendon, or spinal inflammation needs closer evaluation.

Treatment & Management

Psoriatic Arthritis Treatment and Management

ApproachPurposeExamples or considerations
Exercise, physical therapy, and joint protectionMaintain strength, flexibility, mobility, and functionLow-impact activity, tailored exercises, pacing, and assistive strategies
NSAIDs or short-term injectionsRelieve pain and inflammationUsed when appropriate for symptoms; suitability depends on health history
Conventional DMARDsReduce immune-driven inflammation and protect jointsExamples include methotrexate or other disease-modifying medicines
Biologic medicinesTarget specific inflammatory pathwaysThe choice depends on joint, skin, spinal, and other disease features
Targeted oral medicinesBlock selected immune or inflammatory signalsOptions include targeted synthetic medicines prescribed and monitored by a clinician
SurgeryRepair or replace a severely damaged jointConsidered for major structural damage or loss of function when other care is not enough

Psoriatic arthritis treatment is individualized according to the joint pattern, skin disease, spine involvement, other health conditions, pregnancy considerations, and response to therapy. Regular monitoring helps clinicians adjust care safely. The goal is remission or good control rather than a guaranteed permanent cure, and treatment may include both medicines and lifestyle support.

Medication safety

Use medicines with clinical guidance

Do not stop or switch psoriatic arthritis medication without speaking with your clinician. Report symptoms of infection or any significant medication reaction promptly.

Outlook and Prognosis

Outlook and Prognosis for Psoriatic Arthritis

Psoriatic arthritis usually requires ongoing management. Symptoms may flare and improve over time, but many people maintain function when treatment controls inflammation and related health risks are addressed.

  • Early diagnosis and treatment are associated with a better chance of limiting inflammation and joint damage.
  • Persistent inflammation can worsen the long-term outlook if it is not adequately controlled.
  • The extent of joint or spine involvement affects mobility, function, and care needs.
  • Response to treatment helps determine whether the care plan should be continued or adjusted.
  • Taking medicines as prescribed and attending monitoring visits supports long-term disease control.
  • Managing cardiovascular, metabolic, emotional, and other related health risks supports overall wellbeing.

When Should You See a Doctor

When Should You See a Doctor?

  • Arrange a medical appointment for persistent joint pain or swelling.
  • Arrange an assessment for morning stiffness that keeps returning or limits daily activities.
  • Seek evaluation for a whole swollen finger or toe.
  • Discuss new nail changes when they occur with joint symptoms.
  • Contact a clinician if psoriasis is followed by new joint symptoms.
  • Arrange care if a joint becomes difficult to move.

Seek prompt care

Know the urgent warning signs

Sudden eye pain, marked eye redness, vision changes, severe loss of joint function, or signs of a serious medication reaction need urgent medical attention.

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