Rheumatoid Arthritis vs. Osteoarthritis: Understanding the Difference

According to the Centers for Disease Control and Prevention (CDC), an estimated 52.5 million adults are affected by some form of arthritis. The two most common forms of arthritis are Rheumatoid Arthritis (RA) and Osteoarthritis (OA).

While both of these conditions cause joint pain and stiffness, their causes and treatments are very different. At Ability Rehabilitation, we help patients manage both conditions through customized physical and occupational therapy.

What Is Rheumatoid Arthritis (RA)?

Ability Rehabilitation Difference Between Rheumatoid Arthritis and Osteoarthritis
Rheumatoid arthritis is an autoimmune disease. This means your body’s immune system mistakenly attacks healthy joint tissue, causing chronic inflammation.

Causes of RA

While the exact cause isn’t fully understood, experts believe a combination of genetics, hormones, and environmental triggers (like viral infections) can cause the immune system to go awry.

Symptoms of RA

RA symptoms often fluctuate between flares (periods of high activity) and remission. It typically affects smaller joints first (fingers and toes) before spreading to wrists, knees, ankles, and shoulders.

Key RA Warning Signs

  • Symmetrical pain (if your left knee hurts, your right knee usually does too).
  • Swollen, tender, or warm joints.
  • Morning stiffness that lasts for hours.
  • Systemic symptoms like fatigue, fever, and unexplained weight loss.

What Is Osteoarthritis (OA)?

Osteoarthritis is often called wear-and-tear arthritis. It is a degenerative condition where the protective cartilage that cushions the ends of your bones wears down over time.

Causes of OA

OA typically develops gradually due to aging, repetitive stress from sports or work, or previous joint injuries.

Symptoms of OA

Unlike RA, OA is usually localized to the specific joint that has been overworked or injured.

Key OA Warning Signs

  • Joint pain during or after movement.
  • Loss of flexibility or range of motion.
  • A grating or popping sensation when using the joint.
  • The formation of bone spurs around the affected area.

Arthritis Treatment: How Physical & Occupational Therapy Help

While there is no known cure for RA or OA, the primary goal of treatment is to alleviate pain, prevent further damage, and improve your quality of life.

At Ability Rehabilitation, our therapists perform comprehensive examinations to determine the severity of your condition and create a customized treatment plan.

  • Manual therapy: Hands-on techniques to improve joint mobility.
  • Strengthening exercises: Building the muscles around the joint to reduce the load on the bone/cartilage.
  • At-home programs: Strategies to manage flares and maintain progress between sessions.
  • Functional training: Learning how to perform daily tasks with less strain on your joints.

Frequently Asked Questions (FAQ)

Can you have both Rheumatoid Arthritis and Osteoarthritis?

Yes. It is possible to have both. For example, a person may have systemic RA but also develop OA in a specific joint (like a knee or hip) due to a past injury or natural aging.

Osteoarthritis is the most common form of arthritis, affecting millions of people worldwide as they age. Rheumatoid arthritis is less common and affects about 1% of the population.

Actually, the opposite is true! Movement helps lubricate the joints and strengthens the supporting muscles. The key is performing low-impact exercises—like those prescribed by a physical therapist—to avoid overstressing the joints.

A major clue is symmetry. RA usually affects joints on both sides of the body simultaneously. OA is more likely to affect one specific joint or one side of the body. However, a professional diagnosis from a doctor or physical therapist is essential.