What Is Psoriatic Arthritis and How Is It Treated?

Joint pain can develop for many reasons, from everyday wear and tear to injuries and inflammatory conditions. When pain is accompanied by swelling, stiffness or changes in the skin and nails, it may point to a condition that affects more than the joints alone.

Psoriatic arthritis is a chronic inflammatory disease associated with psoriasis. While some people develop skin symptoms first, others may notice joint problems before psoriasis becomes apparent. Recognising the signs early and seeking appropriate treatment can help manage symptoms, preserve joint function and reduce the risk of long-term damage.

What Is Psoriatic Arthritis?

Psoriatic arthritis is a type of inflammatory arthritis that occurs when the immune system mistakenly attacks healthy joints and surrounding tissues. It is closely associated with psoriasis, a skin condition that causes red, scaly patches to develop on the skin.

The condition can affect people differently. Some experience mild symptoms involving only a few joints, while others develop more widespread inflammation that affects multiple joints, tendons and ligaments. Psoriatic arthritis may also involve the spine, hands, feet and nails.

Not everyone with psoriasis will develop psoriatic arthritis, but individuals with psoriasis have a higher risk of developing the condition than the general population.

What Causes Psoriatic Arthritis?

The exact cause of psoriatic arthritis is not fully understood. It is believed to result from a combination of genetic, immune and environmental factors. People with a family history of psoriasis or psoriatic arthritis are also more likely to develop the condition. In some cases, infections, physical injury or significant stress may act as triggers in susceptible individuals, although these do not directly cause the disease.

Common Signs and Symptoms of Psoriatic Arthritis

Symptoms of psoriatic arthritis can vary considerably between individuals and may develop gradually or appear more suddenly.

Joint Pain and Swelling

Pain, tenderness and swelling commonly affect the fingers, toes, wrists, knees or ankles. Symptoms may involve one or several joints.

Morning Stiffness

Many people experience stiffness after waking or following periods of inactivity. This often improves as movement increases throughout the day.

Swollen Fingers or Toes

Inflammation may cause an entire finger or toe to become swollen, giving it a sausage-like appearance. This feature, known as dactylitis, is characteristic of psoriatic arthritis.

Nail Changes

Some individuals develop pitting, thickening, discolouration or separation of the nails from the nail bed. These changes may occur alongside or before joint symptoms.

Heel or Foot Pain

Inflammation where tendons or ligaments attach to bone can cause pain around the heel or sole of the foot. This is known as enthesitis and is a common feature of the condition.

How Is Psoriatic Arthritis Diagnosed?

There is no single test that confirms psoriatic arthritis. Diagnosis involves considering symptoms, examination findings and investigation results together.

Medical History and Physical Examination

A doctor will ask about joint symptoms, skin changes, family history and how symptoms affect daily activities. The joints, skin and nails are examined for signs of inflammation.

Blood Tests

Blood tests may help assess inflammation and exclude other forms of arthritis, such as rheumatoid arthritis. While these tests support the assessment, they cannot confirm psoriatic arthritis on their own.

Imaging Studies

X-rays, ultrasound or MRI scans may be recommended to assess joint inflammation, tendon involvement or structural changes. Imaging also helps distinguish psoriatic arthritis from other joint conditions.

How Is Psoriatic Arthritis Treated?

As psoriatic arthritis can affect each individual differently, treatment is tailored to the pattern and severity of the condition. The goal is to reduce inflammation, relieve symptoms and prevent progressive joint damage.

Medication

Treatment often begins with medication to reduce pain and inflammation. Depending on the severity and pattern of the disease, disease-modifying antirheumatic drugs (DMARDs) may be recommended to control the underlying inflammation and slow disease progression. For some individuals with more active disease, biologic therapies may also be considered where appropriate.

Lifestyle and Exercise

Staying physically active and maintaining joint mobility are important aspects of long-term management. Regular exercise, alongside healthy lifestyle habits such as weight management and smoking cessation, can help support joint function and overall well-being.

Ongoing Monitoring

Psoriatic arthritis can change over time, making regular follow-up an important part of care. Monitoring allows treatment to be adjusted according to disease activity and helps assess both joint and skin symptoms to achieve better long-term control.

Taking the Next Step Towards Better Joint Health

Psoriatic arthritis can present differently from person to person, making early assessment important when symptoms persist or begin to affect daily life. An accurate diagnosis not only helps explain your symptoms but also guides treatment to reduce inflammation and protect the joints over time.

At Leong Keng Hong Arthritis & Medical Clinic in Singapore, individuals living with gout receive personalised care that focuses on long-term disease control rather than simply treating acute flare-ups. Care is provided by A/Prof Leong Keng Hong, with management tailored to each individual's uric acid levels, symptoms and overall health. Schedule a consultation to discuss a long-term gout management plan that supports lasting joint health.

Frequently Asked Questions (FAQs) About Psoriatic Arthritis