Osteoarthritis

Overview

Osteoarthritis is the most common form of arthritis, affecting millions of people around the world. It occurs when the protective cartilage that cushions the ends of your bones gradually wears down over time. While it can damage any joint, osteoarthritis most commonly affects joints in the knees, hips, hands, and spine.

Unlike rheumatoid arthritis, which is an autoimmune condition, osteoarthritis is primarily a degenerative disease driven by mechanical wear, aging, and metabolic factors. The cartilage breakdown leads to bone rubbing against bone, causing pain, swelling, and stiffness. Over time, pieces of bone or cartilage may chip off and float in the joint space, causing further irritation.

Osteoarthritis develops slowly and tends to worsen over years. While there is no cure, many effective treatments are available to slow its progression, reduce pain, and maintain joint function. Staying active, maintaining a healthy weight, and following your treatment plan are the cornerstones of living well with osteoarthritis.

Symptoms

Recognizing the symptoms of osteoarthritis early can lead to faster diagnosis and better outcomes.

Early Symptoms

• Joint pain during or after movement
• Joint stiffness upon waking or after sitting for a while
• Tenderness when light pressure is applied to the joint
• Mild swelling around the joint
• Reduced range of motion

Advanced Symptoms

• Grating or crackling sensation (crepitus) during joint movement
• Bone spurs — hard lumps forming around the affected joint
• Joint deformity or malalignment
• Significant loss of joint function and mobility
• Chronic pain that interferes with daily activities and sleep

Causes & Risk Factors

Common Causes

• Natural wear and tear of joint cartilage over time
• Previous joint injury or surgery
• Repetitive stress on a joint from occupation or sports
• Genetic predisposition affecting cartilage structure
• Obesity placing excess stress on weight-bearing joints
• Metabolic disorders affecting cartilage health

Risk Factors

• Age over 50
• Female sex (more common in women after menopause)
• Obesity or being overweight
• Previous joint injuries
• Repetitive occupational joint stress
• Family history of osteoarthritis
• Bone deformities or malformed cartilage
• Certain metabolic diseases like diabetes or hemochromatosis

How It's Diagnosed

Doctors diagnose osteoarthritis through a combination of physical examination, medical history, and imaging studies. During the exam, your doctor will check affected joints for tenderness, swelling, redness, warmth, and range of motion. They may also listen for crepitus — a grating sound when the joint moves.

X-rays are the most common imaging tool and can reveal cartilage loss shown by narrowing of the joint space, bone spurs, and other changes. MRI may be ordered for more detailed images of cartilage and soft tissues. Blood tests aren't needed to diagnose osteoarthritis but may be done to rule out other conditions like rheumatoid arthritis. Joint fluid analysis can help distinguish osteoarthritis from gout or infection.

Treatment Options

Lifestyle Changes

• Regular low-impact exercise such as walking, swimming, or cycling
• Maintaining a healthy weight to reduce stress on joints
• Physical therapy to strengthen muscles around affected joints
• Using assistive devices like canes or braces for support
• Applying heat to relax muscles and cold to reduce swelling
• Modifying activities to avoid movements that worsen pain

Medications

• Acetaminophen (Tylenol) for mild to moderate pain
• NSAIDs like ibuprofen or naproxen for pain and inflammation
• Topical NSAIDs (creams or gels applied to the joint)
• Duloxetine (Cymbalta), an antidepressant that also helps OA pain
• Corticosteroid injections for temporary relief of severe pain
• Hyaluronic acid injections to supplement joint fluid

Medical Procedures

• Arthroscopy to remove loose cartilage or bone fragments
• Osteotomy — realigning bones to shift weight away from damaged area
• Total joint replacement (arthroplasty) for severely damaged joints
• Joint fusion (arthrodesis) for joints where replacement isn't feasible

Complementary Approaches

• Glucosamine and chondroitin supplements (evidence is mixed)
• Acupuncture for pain relief
• Tai chi and yoga to improve flexibility and balance
• Massage therapy to ease muscle tension around joints

Living With Osteoarthritis

Living with osteoarthritis requires a balance between staying active and protecting your joints. Regular exercise is one of the most important things you can do — it strengthens the muscles that support your joints, improves flexibility, and helps control weight. Low-impact activities like swimming, cycling, and walking are excellent choices. Physical therapy can teach you specific exercises tailored to your affected joints.

Managing pain day to day may involve a combination of medications, hot and cold therapy, and pacing your activities. Many people find that planning their most demanding tasks during times when pain is lowest helps them stay productive. Support groups, either in person or online, can provide emotional support and practical tips from others who understand the daily challenges of living with OA.

Potential Complications

• Severe joint damage requiring joint replacement surgery
• Chronic pain leading to reduced mobility and disability
• Sleep disturbances from nighttime pain
• Depression and anxiety related to chronic pain and limited activity
• Increased fall risk due to joint instability
• Weight gain from reduced physical activity

Prevention

• Maintain a healthy weight to reduce stress on weight-bearing joints
• Stay physically active with regular low-impact exercise
• Protect joints from injury during sports and physical work
• Strengthen muscles around your joints through targeted exercise
• Practice good posture and body mechanics
• Address joint injuries promptly and follow through with rehabilitation

Frequently Asked Questions

Sources

1. Osteoarthritis. Mayo Clinic. View source
2. Osteoarthritis (OA). Centers for Disease Control and Prevention. View source
3. Osteoarthritis. National Institute of Arthritis and Musculoskeletal and Skin Diseases. View source
4. Osteoarthritis Treatment. Arthritis Foundation. View source