Arthritis is often thought of as a single disease that simply makes joints hurt. In reality, the word “arthritis” is an umbrella term covering more than 100 different conditions, all characterised by inflammation or degeneration in one or more joints. It affects people of all ages — including children — and it is among the leading causes of disability worldwide. Understanding the different forms, what drives them, and how they can be managed helps demystify a condition that many people live with for decades.
The Major Types of Arthritis
Two forms account for the majority of cases:
Osteoarthritis (OA) is the degenerative form, where the cartilage cushioning the ends of bones within a joint gradually wears away. As the protective layer thins, bones can rub against each other, causing pain, stiffness, and sometimes the growth of bone spurs. OA is strongly associated with age, but it is not simply an “old person’s disease” — obesity, joint injuries, and repetitive mechanical stress accelerate it considerably.
Rheumatoid arthritis (RA) is an autoimmune disease. In RA, the immune system mistakenly attacks the synovial membrane — the lining of the joints — causing painful inflammation that can, over time, erode both cartilage and bone. Unlike OA, RA tends to affect joints symmetrically (both wrists, both knees) and involves systemic symptoms like fatigue and fever.
Other notable forms include psoriatic arthritis (linked to the skin condition psoriasis), gout (caused by uric acid crystal deposits in joints), ankylosing spondylitis (affecting the spine), and juvenile idiopathic arthritis in children.
What Causes Arthritis?
The causes differ by type, but several shared and specific risk factors have been identified:
- Age: The risk of OA rises with age due to cumulative wear on joints.
- Genetics: A family history of RA or OA increases susceptibility.
- Sex: Women are more likely to develop RA and OA in the hands and knees; men have a higher risk of gout.
- Weight: Each kilogram of excess body weight adds roughly three to four kilograms of force on the knee joint with every step.
- Previous joint injuries: Damaged cartilage from sports injuries or accidents increases long-term OA risk.
- Infections: Certain bacterial and viral infections can trigger reactive arthritis.
- Autoimmune dysfunction: The precise trigger for RA is not fully understood, but a combination of genetic predisposition and environmental factors (such as smoking) appears to play a role.
Symptoms: More Than Just Joint Pain
Joint pain is the defining feature, but arthritis presents with a range of symptoms depending on the type and stage:
- Persistent aching or soreness in one or more joints
- Morning stiffness lasting more than 30 minutes (a hallmark of RA)
- Swelling, warmth, or redness around the joint
- Reduced range of motion and difficulty with everyday tasks
- Grinding or clicking sensations (common in OA)
- Fatigue, low-grade fever, and loss of appetite (more characteristic of RA and other inflammatory types)
- Joint deformity in advanced stages
Early diagnosis mattersIn rheumatoid arthritis particularly, early treatment significantly slows joint damage. If you notice persistent joint swelling, symmetrical joint pain, or morning stiffness that doesn’t resolve within an hour, consult a doctor rather than waiting for symptoms to worsen.
How Is Arthritis Diagnosed?
Diagnosis typically involves a physical examination, a review of symptoms and family history, blood tests (to detect markers like rheumatoid factor or anti-CCP antibodies in RA, or uric acid in gout), and imaging — X-rays, MRI, or ultrasound — to assess joint damage and cartilage health.
Treatment Options
There is no cure for most forms of arthritis, but a wide range of treatments can meaningfully reduce pain, slow progression, and preserve function.
Medications
- NSAIDs (ibuprofen, naproxen) reduce pain and inflammation in both OA and RA.
- DMARDs (disease-modifying antirheumatic drugs) such as methotrexate are a cornerstone of RA treatment, slowing immune-driven joint destruction.
- Biologics are a newer class of DMARDs targeting specific inflammatory pathways — particularly effective in moderate-to-severe RA.
- Corticosteroids offer rapid inflammation relief but are typically used short-term due to side effects.
- Topical treatments (gels and creams) can provide localised relief without systemic side effects.
Physiotherapy and Exercise
Counterintuitively, movement is medicine for arthritis. Regular, low-impact exercise — swimming, cycling, walking, and water aerobics — maintains joint flexibility, strengthens the surrounding muscles (which take pressure off the joint), and improves overall wellbeing. A physiotherapist can design an exercise programme suited to the specific joints affected.
Lifestyle Modifications
- Weight management reduces mechanical stress on load-bearing joints
- An anti-inflammatory diet rich in omega-3 fatty acids, vegetables, and whole grains may help moderate inflammatory symptoms
- Adequate sleep and stress reduction support immune regulation and pain tolerance
- Assistive devices — splints, braces, walking aids — protect joints and maintain independence
Surgical Options
When conservative treatments no longer provide adequate relief, surgical options include joint replacement (hip and knee replacements are among the most performed elective surgeries worldwide), joint fusion, and arthroscopy to clean out damaged tissue.
Living with Arthritis
A diagnosis of arthritis is not a sentence to a life of limitation. Many people with arthritis work full careers, remain physically active, and maintain a high quality of life — particularly when the condition is caught early, managed consistently, and supported by a knowledgeable healthcare team. The key is proactive engagement: learning your specific type, understanding your triggers, and not waiting until the pain becomes unmanageable before seeking care.
Pain management is also psychological. Support groups, cognitive behavioural therapy for chronic pain, and open communication with family and employers all form a meaningful part of a holistic approach. Arthritis changes how you move through the world — but with the right tools, it does not have to define how fully you live in it.