RHEUMATOID ARTHRITIS

Rheumatoid arthritis does not have a single cause. It develops from a combination of immune, genetic, and lifestyle factors, which together trigger abnormal inflammation in the joints. Common triggers include:

Women are more frequently affected, likely due to hormonal and immune system differences.

Rheumatoid arthritis commonly develops between ages 40 and 60 when many people are still actively working and caring for family.

Genetic predisposition can increase susceptibility to autoimmune conditions.

Smoking disrupts immune regulation and is linked to more severe disease. 

Additional joint stress and inflammatory activity may worsen symptoms.

Symptoms vary from person to person and may come and go in flare-ups.

RA usually starts in the small joints of the fingers, wrists and feet. It typically affects the same joints on both sides of the body. Affected joints may feel warm, tender and swollen. Over time, larger joints such as the knees, elbows, shoulders and hips can also be involved.

Because RA is an autoimmune condition, it can affect the whole body. Common signs include tiredness, low-grade fever, loss of appetite and unintended weight loss. In some people, RA may also affect the eyes, lungs, heart, skin or nerves.

No single test can confirm rheumatoid arthritis. A diagnosis is based on your symptoms, a physical examination, blood tests and imaging, all considered together. Early diagnosis matters, because treatment that starts early can help protect the joints before lasting damage occurs.

Your doctor will ask when your pain started, which joints are affected, and how long your morning stiffness lasts. During the examination, they check for swelling, warmth and tenderness, especially in the small joints of the hands, wrists and feet. Pain and swelling in the same joints on both sides of the body is a pattern that points towards RA.

• Rheumatoid factor (RF) and anti-CCP antibodies: these antibodies are often found in people with RA. Anti-CCP can sometimes be detected years before symptoms become obvious.
• ESR and CRP: these markers rise when there is inflammation in the body. They also help track how active the condition is over time.

Normal blood test results do not always rule out RA. Some people have clear signs of inflammatory arthritis but test negative for these antibodies. This is known as seronegative rheumatoid arthritis, and diagnosis then relies more on the clinical picture and imaging.

X-rays show changes in the joints and bones over time. Ultrasound or MRI can pick up early inflammation of the joint lining before any damage shows on an X-ray. Imaging also helps show how far the condition has progressed.

Several joint conditions cause pain, swelling and stiffness, so part of the diagnosis is telling them apart:

• Osteoarthritis is caused by wear and tear. Unlike rheumatoid arthritis, it usually affects weight-bearing joints such as the knees and hips, and the pain tends to worsen with activity and ease with rest.
• Gout is caused by uric acid crystals building up in a joint. It often causes sudden, intense attacks in a single joint, commonly the big toe, whereas RA tends to affect several joints on both sides of the body.

At Singapore Paincare, our Painostic® method looks at the pattern of your pain alongside your test results and scans. This helps make sure treatment is aimed at the right cause.

If your symptoms do not improve or continue to interfere with movement, minimally invasive procedures can target the real source of pain without the need for open surgery. At Singapore Paincare, we offer precise procedures designed to relieve pain at its origin.

• Specialised Injection: Precise injections containing local anaesthetic, anti-inflammatory medication, or low-dose corticosteroid delivered directly into the affected joint. These injections work quickly to reduce pain and swelling, providing relief within days. By controlling inflammation early, these injections allow you to begin rehabilitation and physical therapy sooner, helping you regain function and mobility more effectively.

Surgery is reserved as a last resort for severe RA pain that hasn’t responded to other treatments.

For patients with advanced RA, surgical procedures may help restore some joint function and reduce pain. Common surgical options include:

• Synovectomy: Removal of inflamed joint lining to reduce pain and swelling
• Joint Replacement (Arthroplasty): In late-stage RA, total knee or hip replacement may be necessary to address severe joint destruction and deformity arthroplasties

Case Study: A woman in her mid-50s had two years of morning stiffness and swelling in both hands, with pain shifting from hand to hand. Painkillers hadn’t helped. Examination and blood tests pointed to rheumatoid arthritis, and treatment focused on calming the inflammation behind it. Read the full rheumatoid arthritis case →

Individual results vary.

While rheumatoid arthritis cannot be fully prevented, certain habits can help reduce flare-ups and protect joint health:

• Stop smoking 
• Maintain a healthy body weight 
• Stay physically active with appropriate exercise 
• Eat a balanced diet rich in calcium and vitamin D 
• Limit alcohol intake 
• Maintain good oral health 

Rheumatoid arthritis (RA) and osteoarthritis (OA) can feel similar, as both cause joint pain, stiffness, and reduced mobility—but they behave very differently.

RA pain is not activity-related. It is often constant throughout the day and does not improve with rest. Morning stiffness may ease slightly, but some stiffness usually remains. RA commonly affects small joints and may also present as a single painful, swollen joint, such as the knee. OA pain, in contrast, is usually linked to joint use, worsening with standing or walking and improving with rest.

RA is an autoimmune condition where the immune system attacks the joints, causing ongoing inflammation and potential joint damage. Because RA can also affect other organs, long-term treatment and regular monitoring are important.

At Singapore Paincare, our Painostic® method goes beyond treating symptoms. We identify the real source of discomfort and create an individualised, minimally invasive plan—so you can move comfortably and confidently again.

Updated 1 Oct 2026