What is arthritis
Last updated: April 1, 2026
Key Facts
- Osteoarthritis results from wear and tear of joint cartilage and is the most prevalent type, typically affecting older adults
- Rheumatoid arthritis is an autoimmune disease where the immune system attacks joint linings, causing progressive inflammation
- Arthritis affects over 100 million people globally and is a leading cause of disability, particularly in adults over 65
- Common symptoms include joint pain, swelling, stiffness, reduced range of motion, and inflammation
- Treatment includes anti-inflammatory medications, physical therapy, lifestyle modifications, corticosteroids, and in severe cases, joint surgery or replacement
What is Arthritis?
Arthritis is a group of inflammatory conditions affecting one or more joints. The name derives from Greek, meaning 'joint inflammation.' While arthritis is commonly associated with aging, it can affect people of any age and has over 100 different types, each with distinct causes and characteristics.
Types of Arthritis
Osteoarthritis (OA) is the most common type, caused by gradual wear and tear of cartilage that cushions joints. It typically develops slowly over years and primarily affects weight-bearing joints. Rheumatoid Arthritis (RA) is an autoimmune condition where the body's immune system attacks the synovial membrane lining joints, causing progressive inflammation and joint damage. Other types include gout, lupus-related arthritis, and infectious arthritis.
Causes and Risk Factors
Osteoarthritis develops from joint overuse, age, obesity, and previous injuries. Rheumatoid arthritis results from genetic factors and immune system dysfunction. Risk factors include age, family history, previous joint injury, obesity, and smoking. Gender also plays a role; women are more likely to develop rheumatoid arthritis.
Symptoms and Diagnosis
Common symptoms include joint pain, swelling, warmth around joints, stiffness (especially after inactivity), and reduced range of motion. Diagnosis involves physical examination, blood tests, and imaging such as X-rays or MRI. Early detection is crucial for better management, particularly with rheumatoid arthritis.
Treatment Options
Treatment aims to reduce pain and inflammation while maintaining mobility. Medications include NSAIDs, corticosteroids, and disease-modifying antirheumatic drugs (DMARDs). Physical therapy strengthens muscles and improves joint flexibility. Lifestyle changes include exercise, weight management, and heat/cold therapy. In advanced cases, joint replacement surgery may be necessary.
Related Questions
What is the difference between osteoarthritis and rheumatoid arthritis?
Osteoarthritis is caused by wear and tear of cartilage and develops slowly; rheumatoid arthritis is autoimmune and attacks joint linings, causing faster progression. RA is more systemic and often affects multiple joints simultaneously.
How is arthritis diagnosed?
Arthritis diagnosis involves physical examination, blood tests to check inflammation markers and antibodies, and imaging tests like X-rays or MRI to visualize joint damage and cartilage loss.
What are the best arthritis treatments?
Treatment combines medications (NSAIDs, corticosteroids, DMARDs), physical therapy, lifestyle modifications like exercise and weight management, and in severe cases, joint surgery or replacement therapy.
Sources
- Wikipedia - Arthritis CC-BY-SA-4.0
- Mayo Clinic - Arthritis All Rights Reserved
- Arthritis Foundation All Rights Reserved