Rheumatoid Arthritis: Symptoms, Causes and All Treatment Options Explained
- Dr. Kimryn Rathmell
- 2 days ago
- 7 min read
Rheumatoid arthritis (RA) is one of the most common autoimmune diseases in the world, affecting approximately 1.5 million adults in the United States. Unlike osteoarthritis — which is caused by wear and tear on joints — rheumatoid arthritis is an autoimmune condition in which the immune system mistakenly attacks the body's own joint tissue, causing chronic inflammation, pain, swelling, and if untreated, permanent joint damage.
The good news is that treatment for RA has advanced dramatically in the past three decades. With early diagnosis and the right treatment combination, the majority of people with RA today can achieve low disease activity or even remission — living full, active lives with their condition well controlled.
This complete guide covers the symptoms and early warning signs of RA, how it is diagnosed, what causes it, and every major treatment option available — from lifestyle changes and conventional DMARDs including Hydroxychloroquine, to biological therapies and targeted synthetic medicines.
What is Rheumatoid Arthritis?
Rheumatoid arthritis is a chronic, systemic autoimmune disease. "Systemic" means it can affect the whole body — not just the joints. In RA, the immune system produces antibodies that attack the synovium — the thin membrane that lines the joints — causing inflammation, pain, swelling, and over time, erosion of cartilage and bone within the joint.
RA most commonly affects the small joints of the hands, wrists, and feet symmetrically — meaning both sides of the body are usually affected. However, RA can also affect larger joints including the knees, hips, elbows, and shoulders, and in some people causes systemic complications including anaemia, cardiovascular disease, lung involvement, and eye problems.
RA is distinct from osteoarthritis in several key ways:
Feature | Rheumatoid Arthritis (RA) | Osteoarthritis (OA) |
Cause | Autoimmune disease causing chronic joint inflammation | Mechanical wear and tear of joint cartilage |
Age of Onset | Can occur at any age; most common between 30–60 years | Usually develops after age 50 |
Joint Involvement | Typically symmetrical; often affects small joints of the hands and feet | Often asymmetrical; commonly affects weight-bearing joints such as knees and hips |
Morning Stiffness | Prolonged, usually lasting more than 1 hour | Brief, usually less than 30 minutes |
Systemic Symptoms | Common — fatigue, malaise, low-grade fever, weight loss | Generally absent |
Blood Markers | Rheumatoid factor (RF) and anti-CCP antibodies often positive | Usually normal; no specific diagnostic blood marker |
Early Warning Signs and Symptoms of RA
Recognising RA early is critical — treatment started before significant joint damage occurs leads to significantly better long-term outcomes.
Early symptoms (may precede joint symptoms by weeks or months):
Fatigue — often profound and disproportionate to activity level
General malaise and low-grade fever
Weight loss
Morning stiffness lasting more than 1 hour — one of the most characteristic early features
Joint symptoms:
Pain, swelling, and warmth in the small joints — particularly the knuckles (MCP and PIP joints), wrists, and toes
Symmetrical involvement — both hands affected simultaneously
Tenderness on squeezing the joints
Reduced grip strength
Over time: deformities including ulnar deviation, swan neck deformity, and boutonnière deformity
Systemic features:
Rheumatoid nodules — firm lumps under the skin, typically near the elbows
Anaemia — very common in active RA
Dry eyes and mouth (secondary Sjögren's syndrome)
Lung involvement — interstitial lung disease in a minority
Cardiovascular risk — chronic inflammation accelerates atherosclerosis; cardiovascular disease is the leading cause of premature death in RA
What Causes Rheumatoid Arthritis?
The exact cause of RA is not fully understood. It is believed to result from a combination of genetic predisposition and environmental triggers:
Genetic factors:
HLA-DRB1 gene variants — particularly the "shared epitope" — are the strongest known genetic risk factors
Having a first-degree relative with RA approximately doubles the risk
However, most people with RA have no family history of the condition
Environmental triggers:
Smoking
the strongest modifiable risk factor. Smokers are significantly more likely to develop RA and have more severe disease
Infections
certain bacterial and viral infections (including Epstein-Barr virus, Porphyromonas gingivalis — a bacterium in periodontal disease) have been implicated as potential triggers
Hormonal factors
RA is 2–3 times more common in women; pregnancy temporarily suppresses RA activity; the postpartum period is a time of increased risk of flare
The autoimmune mechanism:
In genetically susceptible individuals, an environmental trigger appears to initiate a breakdown in immune tolerance — the immune system begins producing antibodies (particularly anti-cyclic citrullinated peptide antibodies, anti-CCP) that attack joint tissue. This process can begin years before clinical symptoms appear.
How is Rheumatoid Arthritis Diagnosed?
RA is diagnosed by rheumatologists based on a combination of clinical features, blood tests, and imaging.
Blood tests:
Rheumatoid Factor (RF)
positive in approximately 70–80% of RA patients; also seen in other conditions
Anti-CCP antibodies (anti-cyclic citrullinated peptide)
more specific for RA than RF; positive in approximately 70% of patients; can be positive years before clinical symptoms
Inflammatory markers
elevated ESR (erythrocyte sedimentation rate) and CRP (C-reactive protein) indicate active inflammation
Full blood count
often shows anaemia of chronic disease
Imaging:
X-rays
show joint erosions and narrowing in established disease; often normal in early RA
Ultrasound
detects synovitis (joint inflammation) and erosions earlier than X-ray
MRI
most sensitive for early joint changes
ACR/EULAR 2010 classification criteria are used to standardise diagnosis — awarding points for joint involvement, serology (RF/anti-CCP), inflammatory markers, and symptom duration. A score of 6 or more out of 10 meets classification criteria for RA.
Treatment Options for Rheumatoid Arthritis
The goal of RA treatment is "treat-to-target" — aiming for remission or low disease activity, measured by validated scoring tools, with regular assessment and treatment adjustment until the target is reached.
1. Disease-Modifying Anti-Rheumatic Drugs (DMARDs) — Cornerstone of Treatment
DMARDs modify the underlying disease process — slowing or halting joint damage — rather than just relieving symptoms. They are started as soon as the diagnosis is confirmed.
Hydroxychloroquine (HCQS / Plaquenil)
Hydroxychloroquine is one of the oldest and best-tolerated DMARDs, used in RA for over 60 years. It works by modulating the immune response — reducing inflammation and cytokine production — without fully suppressing immunity. Key advantages:
Excellent long-term safety profile
No requirement for regular blood monitoring (unlike Methotrexate)
Protects against cardiovascular complications of RA
Safe in pregnancy — one of the only RA medicines that can be continued during pregnancy
Often used as monotherapy in mild RA or in combination with Methotrexate in moderate RA
Dose: typically 200–400mg per day (not exceeding 5mg/kg/day to minimise retinal toxicity risk).
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Methotrexate (MTX)
The most widely used DMARD globally and the anchor medicine of most RA treatment regimens. Taken once weekly (not daily). Highly effective at reducing disease activity and preventing joint damage. Requires regular blood monitoring (liver function, full blood count). Folate supplementation reduces side effects.
Sulfasalazine
Often used in combination with Hydroxychloroquine and Methotrexate in the "triple therapy" regimen — highly effective and used when biological therapy is not available or suitable.
Leflunomide
Alternative to Methotrexate for patients who cannot tolerate it. Requires regular monitoring.
2. Biological DMARDs (bDMARDs)
For patients who do not achieve adequate disease control with conventional DMARDs, biological medicines targeting specific inflammatory pathways are added.
TNF inhibitors (first-line biologics):
Adalimumab (Humira), Etanercept (Enbrel), Certolizumab, Golimumab
Highly effective; given by injection; require screening for tuberculosis before starting
IL-6 inhibitors:
Tocilizumab (Actemra), Sarilumab
Particularly effective for systemic features (anaemia, fatigue)
B-cell depletion:
Rituximab (MabThera) — particularly useful in seropositive RA (RF/anti-CCP positive)
T-cell co-stimulation blocker:
Abatacept (Orencia)
3. Targeted Synthetic DMARDs (tsDMARDs) — JAK Inhibitors
The newest class of oral RA treatments — Tofacitinib (Xeljanz), Baricitinib (Olumiant), Upadacitinib (Rinvoq). These medicines block JAK (Janus kinase) enzymes involved in the inflammatory signalling cascade. Highly effective, oral (not injected), but associated with some cardiovascular and thromboembolic risks requiring careful patient selection.
4. NSAIDs and Corticosteroids — Symptom Relief
NSAIDs (ibuprofen, naproxen)
relieve pain and stiffness but do not modify disease progression. Used short-term for symptom control.
Corticosteroids(prednisolone, methylprednisolone)
highly effective at rapidly reducing inflammation during flares. Used as bridging therapy while DMARDs take effect (typically 3–6 months). Long-term use associated with significant side effects — osteoporosis, weight gain, diabetes risk, adrenal suppression.
5. Lifestyle Measures
Regular low-impact exercise
physiotherapy-guided exercise reduces pain, maintains joint function, and improves cardiovascular health. Swimming, cycling, yoga, and tai chi are particularly well-suited.
Smoking cessation
smoking worsens RA disease activity and reduces the effectiveness of biological treatments
Weight management
obesity worsens inflammatory disease activity and increases cardiovascular risk
Diet
Mediterranean-style diet (rich in fish, olive oil, fruits, vegetables) is associated with reduced inflammatory markers in RA
Occupational therapy
joint protection techniques, assistive devices, and workplace modifications
Monitoring and Long-Term Management
RA requires lifelong monitoring and treatment adjustment:
Disease activity scores
(DAS28, CDAI, SDAI) measured at every rheumatology appointment
Regular blood tests
depending on the DMARD used (Methotrexate requires monthly FBC and LFTs)
Eye checks
annual ophthalmology review after 5 years of Hydroxychloroquine
Bone density
DEXA scan if on long-term corticosteroids
Cardiovascular risk factor management
blood pressure, cholesterol, blood sugar monitoring
Frequently Asked Questions
Can rheumatoid arthritis be cured?
There is currently no cure for RA. However, with early diagnosis and appropriate treatment, the majority of patients can achieve sustained remission — a state in which there is no active inflammation and joint damage is halted. Some patients in remission can eventually reduce or stop medicines under rheumatologist supervision.
Is Hydroxychloroquine effective for rheumatoid arthritis?
Yes. Hydroxychloroquine is an established, evidence-based DMARD for RA, used for over 60 years. It is most effective for mild-to-moderate RA and is particularly valued for its excellent safety profile, cardiovascular protection, and compatibility with pregnancy. It is often combined with Methotrexate for moderate RA.
How long does it take for RA treatment to work?
Hydroxychloroquine typically takes 3–6 months to reach full effect. Methotrexate takes 6–12 weeks. Biological medicines (TNF inhibitors) often produce significant improvement within 4–6 weeks. Corticosteroids work within days but are for short-term use only.
Is RA hereditary?
Having a first-degree relative with RA approximately doubles the risk of developing it. However, most people with RA have no family history of the condition. Genetics accounts for approximately 50–60% of RA susceptibility; environmental factors including smoking account for the rest.
Does diet affect rheumatoid arthritis?
Diet alone cannot treat RA, but dietary choices affect inflammation levels. A Mediterranean diet (fish, olive oil, fruits, vegetables, whole grains) is associated with reduced inflammatory markers. Omega-3 fatty acids from oily fish have anti-inflammatory properties. Processed foods, refined sugar, and red meat may worsen inflammation in some patients.
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