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Arthritis (Osteoarthritis, Rheumatoid Arthritis)

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Introduction

Arthritis is a common condition that causes pain, swelling and stiffness in one or more joints. Understanding arthritis is key to managing the various forms of this pervasive condition. While there are over 100 different forms of arthritis, the two most common are Osteoarthritis (OA) and Rheumatoid Arthritis (RA).

Osteoarthritis arthritis symptoms are typically related to wear-and-tear, while rheumatoid arthritis symptoms point to an autoimmune disease. Both can significantly impact mobility and quality of life.

The good news is that with early diagnosis and the right care, people with arthritis can manage their symptoms, reduce pain, maintain joint function and lead more active lives.

On this page, you will find:

If you suspect you have persistent joint pain, stiffness or other symptoms of arthritis, know that help is here for you.

Signs & Symptoms

Understanding the various kinds of arthritis is essential for proper diagnosis and management, as diseases that cause arthritis have distinct characteristics.

While both osteoarthritis (OA) and rheumatoid arthritis (RA) present with joint pain and stiffness, their underlying mechanisms and symptoms differ significantly.

Common Symptoms (May be present in both OA and RA, but with distinctions):

  • Joint pain:
    • Osteoarthritis (OA): described as an aching, throbbing or sharp pain that typically worsens with activity or movement and improves with rest. Pain tends to be more localised to the affected joint.
    • Rheumatoid Arthritis (RA): more persistent and severe, even at rest, and can be throbbing or aching.
  • Joint stiffness
    • Osteoarthritis (OA): Morning stiffness usually lasts less than 30 minutes and improves with movement.
    • Rheumatoid Arthritis (RA): Morning stiffness is a hallmark and typically lasts 30 minutes or longer, sometimes several hours. It can also occur after prolonged rest during the day.
  • Swelling
    • Osteoarthritis (OA): Swelling is often mild to moderate, may be due to fluid accumulation (effusion) or bony enlargement.
    • Rheumatoid Arthritis (RA): Swelling is typically more pronounced, often feeling “boggy” or “spongy” due to inflammation of the joint lining (synovitis).
  • Reduced range of motion: Difficulty moving the joint fully. This can be due to pain, stiffness or structural changes in both conditions.


Early signs of arthritis may vary based on the affected joints.

  • In the knees, symptoms might include pain during or after movement, stiffness, tenderness and a grating sensation.
  • In the fingers, you might notice stiffness, swelling and pain in the small joints, particularly in the morning or after use.

Causes & Risk Factors

Arthritis causes differ significantly between osteoarthritis and rheumatoid arthritis.

Key causes include:

  • Osteoarthritis (OA): This is a degenerative disease, occurring when the cartilage that cushions the ends of bones wears down over time.
    • Age: Risk increases with age
    • Obesity: Increased stress on weight-bearing joints
    • Joint injury or overuse: Previous trauma or repetitive stress
    • Genetics: Some people inherit a predisposition
  • Rheumatoid Arthritis (RA): This is an autoimmune disorder where the body’s immune system mistakenly attacks the lining of the joints (synovium), leading to inflammation.
    • Autoimmune response: The fundamental reason for rheumatoid arthritis
    • Genetics: Certain genes, like HLA-DRB1, increase susceptibility.
    • Environmental factors: Smoking, infections and gut microbiome imbalances are being investigated as potential triggers for what brings on rheumatoid arthritis
    • Hormonal factors: More common in women

Diseases that cause arthritis can include other autoimmune conditions (e.g., lupus, psoriasis leading to psoriatic arthritis) or infections (septic arthritis).

Diagnosis

An accurate diagnosis will confirm your arthritis and determine the next steps for treatment.

  • Detailed medical history and symptom review: Your specialist will ask about your symptoms, including when and how the pain occurs, its patterns, and any family history of autoimmune diseases.
  • Physical examination: Your specialist will examine your joints for swelling, redness, warmth, tenderness, and range of motion. For rheumatoid arthritis in the hands, they will look for characteristic swelling patterns.
  • Imaging scans:
    • X-rays: Can show cartilage loss, bone spurs (OA), joint space narrowing, and bone erosion (RA). They are crucial for assessing degenerative arthritis.
    • MRI: Provides detailed images of cartilage, tendons, ligaments, and bone marrow.
    • Ultrasound: Can detect inflammation in the joint lining and around tendons.
  • Blood tests:
    • Rheumatoid factor (RF) and anti-cyclic citrullinated peptide (anti-CCP) antibodies: Positive in many people with RA.
    • Erythrocyte Sedimentation Rate (ESR) and C-reactive protein (CRP): Inflammatory markers are often elevated in RA.
    • Other tests are used to rule out diseases that cause arthritis or mimic it.
  • Joint fluid analysis: A sample of fluid from the joint can be examined for inflammation or infection.

Types of Arthritis

There are numerous forms of arthritis, each with distinct characteristics.

The most common types include:

1. Osteoarthritis (OA)

  • Description: A degenerative joint disease caused by the wear and tear of cartilage, which cushions the ends of bones.
  • Pattern: Most often affects weight-bearing joints like the knees, hips, lower back, hands, and neck. It usually starts on one side of the body.
  • Progression: Develops slowly over the years. Symptoms like joint pain, stiffness, and reduced mobility worsen with activity and age. May lead to joint deformity or bone spurs.

2. Rheumatoid Arthritis (RA)

  • Description: A chronic autoimmune disease where the immune system mistakenly attacks the joints, causing inflammation of the synovium (joint lining).
  • Pattern: Typically affects smaller joints first, such as fingers and toes, and tends to be symmetrical (same joints on both sides of the body).
  • Progression: Can lead to joint erosion and deformity over time. Inflammation may also affect the eyes, lungs, skin, and blood vessels. Early treatment can slow progression.

3. Psoriatic Arthritis

  • Description: An inflammatory arthritis linked to psoriasis, a skin condition. It causes joint pain, swelling, and skin lesions.
  • Pattern: May affect any joint, including the spine and fingers. It can be asymmetrical and may involve dactylitis (sausage-like swelling of fingers or toes).
  • Progression: Can be mild or severe. If untreated, it may lead to permanent joint damage and disability. Skin and joint symptoms may flare and subside unpredictably.

4. Gout

  • Description: A type of arthritis caused by excess uric acid, which forms sharp crystals in the joints.
  • Pattern: Commonly affects the big toe, but can occur in ankles, knees, and other joints. Sudden attacks of intense pain, redness, and swelling are typical.
  • Progression: If unmanaged, attacks can become more frequent and affect more joints. Chronic gout can cause joint damage and tophi (uric acid crystal deposits under the skin).

5. Ankylosing Spondylitis

  • Description: A form of inflammatory arthritis that primarily affects the spine and sacroiliac joints.
  • Pattern: Pain and stiffness typically begin in the lower back and hips, especially in the morning or after periods of inactivity.
  • Progression: Over time, vertebrae may fuse together, reducing spinal flexibility and leading to a hunched posture. It can also affect the eyes and cause fatigue.

6. Juvenile Idiopathic Arthritis (JIA)

  • Description: The most common type of arthritis in children under 16, with no known cause (idiopathic).
  • Pattern: Affects one or more joints and may be accompanied by symptoms like fever, rash, or eye inflammation.
  • Progression: Some children outgrow it; others may experience long-term joint issues. Early diagnosis and treatment improve long-term outcomes.

7. Lupus Arthritis

  • Description: A manifestation of systemic lupus erythematosus (SLE), an autoimmune disease that can cause widespread inflammation.
  • Pattern: Often affects the small joints of the hands, wrists, and knees. Usually symmetrical and associated with other lupus symptoms like fatigue, rashes, and organ involvement.
  • Progression: Joint symptoms may flare and subside. Unlike RA, lupus arthritis typically causes less joint damage, but systemic effects can be more serious if not managed.

Treatments

Treatment focuses on managing pain (rheumatic pain), reducing inflammation, slowing disease progression and improving joint function. The approach varies significantly between osteoarthritis and rheumatoid arthritis.

Key treatment elements for arthritis:

  • Osteoarthritis (OA) treatments:
    • Pain relievers: NSAIDs, acetaminophen
    • Physical therapy: Exercises to strengthen muscles around the joint and improve flexibility
    • Weight management: Reduces stress on joints
    • Joint injections: Corticosteroids or hyaluronic acid
  • Rheumatoid Arthritis (RA) treatments:
    • Disease-Modifying Antirheumatic Drugs (DMARDs): To slow disease progression and prevent joint damage.
    • Biologics: Targeted therapies that block specific parts of the immune system involved in inflammation.
    • NSAIDs and corticosteroids: For symptom relief (pain and inflammation).
    • Physical and occupational therapy: To maintain joint function and adapt daily activities.

When managed properly, people with arthritis can significantly improve their quality of life.

Ready to learn what might help you? Learn more about arthritis treatments on this treatment page.

Complications

Without treatment or proper management, arthritis can lead to:

  • Chronic pain and disability
  • Joint damage and deformity 
  • Loss of mobility and independence
  • Increased risk of other health problems (e.g. nerve damage in RA)
  • Impact on mental health (depression, anxiety) due to chronic pain and limitations
  • Side effects from long-term medication use

Prevention

While you cannot prevent all causes, you can lower the risk of developing certain forms of arthritis or manage their progression by:

  • Maintaining a healthy weight: Reduces stress on joints
  • Regular exercise: Low-impact activities like swimming, cycling, and walking strengthen muscles and support joints
  • Protecting your joints: Using proper body mechanics, avoiding repetitive strain, and wearing protective gear during sports
  • Eating an anti-inflammatory diet: Rich in fruits, vegetables, whole grains, and omega-3 fatty acids
  • Quitting smoking: Smoking is a significant risk factor for RA
  • Early intervention: If you notice early signs of arthritis in your knees or other joints, seek medical advice promptly
  • Managing underlying conditions: Control diabetes and other diseases that cause arthritis

With the right precautions and awareness, many people can maintain healthier joints.

Living with Arthritis

Living well means managing your condition day to day:

  • Adhere to your prescribed treatment plan
  • Engage in regular, joint-friendly exercise
  • Use assistive devices as needed to protect joints
  • Manage stress and prioritise adequate rest
  • Educate yourself about your specific kinds of arthritis and its management

Navigating Arthritis in Singapore

The Problem and Types of Conditions

Arthritis affects many individuals, particularly as they age, but it can also occur in younger adults due to autoimmune conditions or injury. Common types include osteoarthritis, which results from joint wear and tear, and rheumatoid arthritis, an autoimmune disorder where the immune system attacks the joints. Without proper care, arthritis can lead to stiffness, pain, and limited mobility that impact daily activities.

Consultation to Ongoing Care

Seeking care for arthritis in Singapore often starts with a consultation with a general practitioner, rheumatologist, or orthopaedic specialist. Diagnosis may involve physical examinations, imaging tests, or blood work. Treatment plans may include medication to reduce inflammation, physiotherapy to maintain mobility, and in some cases, surgery to repair or replace damaged joints. Ongoing care usually involves lifestyle adjustments, regular monitoring, and long-term treatment strategies to help patients maintain independence and quality of life.

When to Seek Help

You should consider professional help for arthritis in Singapore if joint pain, stiffness, or swelling interfere with your daily activities or do not improve with rest and over-the-counter remedies. Early medical attention can slow the progression of arthritis and reduce the risk of permanent joint damage. Timely consultation also ensures you receive a treatment plan tailored to your needs, helping you stay active and better manage your long-term joint health.

Find an Arthritis Specialist in Singapore

You do not have to manage arthritis alone. A specialist can help assess your symptoms, provide a proper diagnosis, adjust medication and offer strategies for pain management and joint protection.

If you or someone you love has persistent joint pain, stiffness or other symptoms of arthritis in the knees or fingers, book a consultation to get clear answers.

Take the first step toward stable joint health and peace of mind.

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  • Book an appointment with a trusted specialist
  • Get a personalised assessment and treatment plan
  • Find the support you need to take care of your health with confidence

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