Rheumatoid Arthritis — Symptoms, Causes, Diagnosis, Treatment & Complete Guide
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer
Rheumatoid arthritis (RA) is a chronic autoimmune condition in which the immune system attacks the joint lining, causing painful swelling that can erode bone and deform joints. It usually begins in the small joints of the hands and feet on both sides, with prolonged morning stiffness. There is no cure, but early DMARD treatment greatly improves remission chances.
What the research says
Methotrexate injections worked about as well as tablets, and a newer drug class matched TNF inhibitors over four years. A systematic review and meta-analysis of randomized trials prepared for the 2024 Japan College of Rheumatology guideline update found that subcutaneous methotrexate showed similar efficacy to oral methotrexate in people who had not taken it before, and that Janus kinase inhibitors combined with methotrexate achieved similar clinical responses and equal safety over a 4-year period compared with TNF inhibitors in people whose disease did not respond adequately to methotrexate. (Nakayama et al., Mod Rheumatol, 2024) [3]
Roughly 12% of people with rheumatoid arthritis still meet criteria for difficult-to-treat disease. A meta-analysis of 23 studies (27,987 people with RA from 13 countries) found a pooled prevalence of difficult-to-treat RA of 11.7% (95% CI 9.5% to 14.3%), with about half of those patients showing persistent inflammatory refractory disease; under a stricter definition, 4.3% had failed three or more biologic or targeted synthetic drugs. (Xie et al., Ann Rheum Dis, 2026) [4]
Smoking was linked to higher odds of developing rheumatoid arthritis. In a prospective cohort of 40,393 Australian women (332 new RA cases), ever smoking was associated with higher odds of RA (odds ratio 1.29, 95% CI 1.02 to 1.64) after adjusting for all factors except age; each unit increase in BMI was also linked to higher odds (odds ratio 1.03, 95% CI 1.01 to 1.05) when adjusted for smoking, alcohol intake and education, but not once age or parity was accounted for. This is an observational study of women only. (Koller-Smith et al., BMC Rheumatol, 2026) [5]
At a Glance
Aspect | Summary |
Condition type | Chronic autoimmune disease |
What happens | Immune system attacks joint lining; fluid builds up; joints can deform |
First joints affected | Small joints of the hands and feet, usually both sides |
Key early clue | Morning stiffness lasting 45 minutes or longer |
Who is at higher risk | People assigned female at birth; middle age; family history; smokers; gum disease; excess weight |
Beyond the joints | Skin, eyes, lungs, heart, nerve tissue, blood |
Diagnosis tools | Physical exam, ESR/CRP, rheumatoid factor, anti-CCP, X-ray, MRI, ultrasound |
Main treatments | NSAIDs, steroids, conventional DMARDs, biologic agents, targeted synthetic DMARDs |
Cure? | No — but remission is achievable with early treatment |
What is rheumatoid arthritis?
Rheumatoid arthritis is an ongoing (chronic) condition that causes pain, swelling, and inflammation in the joints. But it is more than a joint disease. RA can also damage the skin, eyes, lungs, heart, and blood vessels.
The trouble starts in the synovium — the thin tissue that lines each joint and produces the fluid that keeps joints lubricated. In RA, the immune system sends antibodies to the synovium and causes inflammation. As this tissue becomes inflamed and thickens, fluid builds up inside the joint. Over time, the inflammation eats away at the bone beneath, and joints can bend out of shape and shift out of place — a result called deformity.
This is the crucial difference from the more common osteoarthritis, which damages joints from overuse and wear and tear. RA is an autoimmune condition: the immune system attacks the body's own tissues by mistake. Some people have both conditions. (See our [gout](https://www.rinnit.com/post/gout-symptoms-causes-diagnosis-treatment-and-complete-guide) guide for how the different types of arthritis compare.)
Newer medicines have greatly improved treatment choices. But left untreated, rheumatoid arthritis can cause long-term joint damage and raises the risk of heart disease. That is why catching it early matters so much.
What are the symptoms of rheumatoid arthritis?
Symptoms of rheumatoid arthritis typically come and go. Periods when the condition becomes more active are called flares; quieter periods with little or no swelling and pain are called remission.
The three main symptoms are:
Painful, warm, swollen joints.
Joint stiffness that is worst in the mornings and after periods of rest — and can last 45 minutes or longer.
Whole-body symptoms such as tiredness, fever, and loss of appetite.
RA usually begins by affecting just a few joints at first — most often the small joints of the hands and feet. As the disease progresses, symptoms spread to the wrists, elbows, hips, knees, and ankles. A hallmark clue: symptoms most often affect the same joints on both sides of the body.
Symptom | What to notice |
Joint pain, warmth, swelling | Especially in hands, wrists, feet, knees |
Morning stiffness | Lasts 45 minutes or more, worse after rest |
Fatigue, fever, poor appetite | Whole-body inflammatory effects |
Both-sided pattern | Same joints affected on left and right |
Spreading pattern | Starts small (fingers, toes) → wrists, elbows, hips, knees, ankles |
Beyond the joints, RA may also affect the skin, eyes, lungs, heart, nerve tissue, and blood. Over time, joints can bend out of shape and shift out of place, making daily activities at home or at work difficult.
When to see a doctor: Make an appointment if you have ongoing pain and swelling in your joints that is not getting better after several weeks. Pain, swelling, and stiffness that come and go on both sides of the body deserve a proper evaluation — because starting treatment early can make a real difference.
Causes: Why Does the Immune System Attack?
Experts do not know the exact cause of rheumatoid arthritis. What is certain is the mechanism: it is an autoimmune condition in which the immune system attacks healthy joint tissue by mistake.
The cause is likely a mix of genetic changes and environmental factors. Hormones may play a role as well. In some people whose genes make them more susceptible, an infection with certain viruses may act as the trigger that starts the disease.
What 6 risk factors raise your chances of rheumatoid arthritis?
Risk factor | How it matters |
Your sex | People assigned female at birth are more likely than those assigned male to develop RA. |
Age | RA can begin at any age, but most often starts in middle age. (Children and young teens may get a related condition called juvenile idiopathic arthritis.) |
Family history | A family member with RA or other autoimmune conditions raises your risk. |
Smoking | Cigarette smoking over time raises the risk, and seems to make the condition worse in people who keep smoking. |
Gum infection | Serious gum infection (periodontal disease) damages the soft tissue around teeth and raises RA risk. |
Excess weight | People who are overweight appear to be at a somewhat higher risk. |
What 8 complications can rheumatoid arthritis cause?
Rheumatoid arthritis increases the risk of several serious conditions beyond the joints, including osteoporosis, rheumatoid nodules, dry eyes and mouth, and infections.
Osteoporosis. RA itself — and some of its medicines — can weaken bones and make them more likely to break.
Rheumatoid nodules. Firm bumps of tissue that most often form around pressure points such as the elbows, but can form anywhere in the body, including the heart and lungs.
Dry eyes and mouth. People with RA are much more likely to develop secondary Sjogren's syndrome, which lowers moisture in the eyes and mouth.
Infections. RA and many of its treatments can harm the immune system. Vaccinations against the flu, pneumonia, shingles, and COVID-19 can help prevent infections.
Carpal tunnel syndrome. When RA affects the wrists, swelling can press on the nerve to the hand and fingers.
Heart problems. RA raises the risk of hardened and blocked arteries, and of inflammation of the sac around the heart.
Lung disease. Inflammation of lung tissues can cause scarring and worsening shortness of breath over time.
Lymphoma. RA raises the risk of blood cancers in the lymph system, and possibly other cancers as well.
How is rheumatoid arthritis diagnosed?
Rheumatoid arthritis can be hard to diagnose early because its early symptoms resemble other common conditions. Diagnosis typically combines three tools:
Physical exam. Your healthcare professional checks the joints for swelling, redness, and warmth, and may test reflexes and muscle strength.
Blood tests. People with RA often have an elevated erythrocyte sedimentation rate (ESR, also called sed rate) or C-reactive protein (CRP) level, showing higher inflammation in the body. Other blood tests look for rheumatoid factor and anti-CCP (anti-cyclic citrullinated peptide) antibodies.
Imaging tests. X-rays track RA in the joints over time, while MRI scans and ultrasound may help with the initial diagnosis and show how severe the condition is.
Can rheumatoid arthritis be cured, and how is it treated?
There is no cure for rheumatoid arthritis, and joint damage can happen quickly without treatment. But clinical studies show that remission is far more likely with early treatment using disease-modifying antirheumatic drugs (DMARDs). Treatment also requires regular follow-up with your healthcare team to watch for joint damage, check whether treatment is working, and monitor for side effects.
Medications
Your treatment plan depends on how severe your symptoms are and how long you have had RA. Five classes of medicine are used:
Medicine class | What it does | Examples & key notes |
NSAIDs | Relieve pain and ease swelling and inflammation | OTC ibuprofen (Advil, Motrin IB) and naproxen sodium (Aleve); stronger prescription versions exist. Side effects may include stomach upset, heart problems, and kidney damage. |
Steroids (corticosteroids) | Ease inflammation and pain, slow joint damage | Prednisone (Rayos) for quick relief; the goal is to taper off once the condition is controlled. High doses over a long time raise risks: bone thinning, fractures, skin thinning, weight gain, diabetes, cataracts, glaucoma. |
Conventional DMARDs | Slow disease progression and save joints and tissues from long-term damage | Methotrexate (Trexall, Otrexup), leflunomide (Arava), hydroxychloroquine (Plaquenil, Sovuna), sulfasalazine (Azulfidine). Side effects may include liver damage and severe lung infections. |
Biologic agents | Newer class (biologic response modifiers) that targets specific immune pathways | Abatacept (Orencia), adalimumab (Humira), anakinra (Kineret), certolizumab (Cimzia), etanercept (Enbrel), golimumab (Simponi), infliximab (Remicade), rituximab (Rituxan), sarilumab (Kevzara), tocilizumab (Actemra). Work best with a conventional DMARD such as methotrexate; raise the risk of rare infections (TB, fungal) and need close monitoring. |
Targeted synthetic DMARDs | Human-made medicines used when conventional DMARDs and biologics haven't worked | Baricitinib (Olumiant), tofacitinib (Xeljanz), upadacitinib (Rinvoq). Higher doses of tofacitinib may raise the risk of blood clots in the lungs, serious heart events, and cancer. |
Therapy
A physical or occupational therapist can teach exercises that keep your joints moving and suggest ways to perform daily tasks that are easier on your joints — for example, picking up objects with your forearms instead of your hands. Assistive devices also help: a kitchen knife with a hand grip protects finger and wrist joints, and buttonhooks make dressing easier. Medical supply stores and brochures are good places to look for ideas.
Surgery
Better medicines have lowered the need for surgery. But if medicines fail to prevent or slow joint damage, your healthcare team may consider surgery to replace or repair the damaged joint. The type depends on the joint involved, and surgery can help you use the joint again and ease pain.
What lifestyle and home remedies help with rheumatoid arthritis?
Rheumatoid arthritis symptoms can be eased with self-care alongside medicines, such as regular gentle exercise, heat or cold, relaxation techniques and not smoking.
Exercise regularly. Gentle exercise strengthens the muscles around your joints and helps you feel less tired. Check with your healthcare team first, and start with walking. Don't exercise tender, injured, or inflamed joints.
Apply heat or cold. Heat eases pain and relaxes tense, painful muscles. Cold dulls pain, numbs the area, and can ease swelling.
Relax. Lowering stress helps you cope with pain. Techniques such as guided imagery, deep breathing, and muscle relaxation all help control pain.
Don't smoke. Smoking can make rheumatoid arthritis worse. If you smoke, ask your healthcare team to help you quit.
What alternative medicine options are there for rheumatoid arthritis?
Some complementary treatments, such as fish oil supplements and tai chi, have shown promise for easing rheumatoid arthritis symptoms.
Fish oil. Some studies suggest fish oil supplements may ease pain and stiffness. Side effects include nausea, belching, and a fishy taste. Fish oil can interfere with medicines, so check with your healthcare professional first.
Tai chi. This movement therapy combines gentle exercises, stretches, and deep breathing. Small studies have found it may improve mood and quality of life in people with RA. It is safe when led by a trained instructor — but skip any move that causes pain or makes it worse.
How can people cope with rheumatoid arthritis?
Pain and limited mobility from rheumatoid arthritis can affect work and family life, making coping strategies an important part of care. Depression and worry are common, and you may feel helpless or bad about yourself. How much RA affects your daily life depends in part on how well you cope, so talk with your healthcare team about strategies. Three approaches help:
Take control. Make a management plan with your healthcare team — feeling in charge of your condition makes a difference.
Know your limits. RA can make you very tired, so rest when you are tired and take short naps when needed.
Connect with others. Let the people close to you know how you are feeling. They may be worried but unsure it is OK to ask about your pain — and having someone to talk to helps.
Frequently Asked Questions
What is rheumatoid arthritis?
Rheumatoid arthritis is a chronic autoimmune condition in which the immune system attacks the tissue lining the joints (the synovium), causing painful swelling, fluid buildup, and eventual bone erosion. Unlike osteoarthritis, which comes from wear and tear, RA is caused by the immune system mistakenly attacking healthy tissue.
What are the first signs of rheumatoid arthritis?
The earliest signs are painful, warm, swollen joints and morning stiffness that lasts 45 minutes or longer. Symptoms most often start in the small joints of the hands and feet, usually on both sides of the body, and may be accompanied by tiredness, fever, and loss of appetite.
Can rheumatoid arthritis be cured?
There is no cure for rheumatoid arthritis, and joint damage can happen quickly without treatment. However, clinical studies show that early treatment with disease-modifying antirheumatic drugs (DMARDs) makes remission — periods with little or no pain or swelling — far more likely.
How is rheumatoid arthritis diagnosed?
RA is diagnosed through a physical exam of the joints, blood tests (ESR/sed rate, CRP, rheumatoid factor, and anti-CCP antibodies), and imaging such as X-rays, MRI, or ultrasound. It can be hard to diagnose early because its symptoms resemble other common conditions.
What is the difference between rheumatoid arthritis and osteoarthritis?
Osteoarthritis damages joints through overuse and wear and tear, while rheumatoid arthritis is an autoimmune disease in which the immune system attacks the joint lining and eats away at the bone beneath it. The two can affect the same person, and some people have both conditions.
Does rheumatoid arthritis affect organs other than the joints?
Yes. RA can also damage the skin, eyes, lungs, heart, nerve tissue, and blood, and raises the risk of complications such as osteoporosis, rheumatoid nodules, dry eyes and mouth (Sjogren's syndrome), carpal tunnel syndrome, heart problems, lung disease, and lymphoma.
Conclusion
Rheumatoid arthritis is an autoimmune disease, not simple wear and tear — and that distinction shapes everything about how it should be handled:
The immune system is the real problem. RA attacks the joint lining, eats at the bone beneath, and can affect organs far beyond the joints.
Early warning signs are specific. Morning stiffness lasting 45 minutes or more, in the small joints of both hands or both feet, that doesn't improve over several weeks, deserves prompt medical attention.
Early treatment changes the outcome. While there is no cure, modern DMARDs and biologics can bring remission and prevent lasting joint damage — the earlier they start, the better.
This guide has walked you through the symptoms, causes, six risk factors, eight complications, the diagnostic workup, all five medication classes, therapies, surgery, and everyday self-care — everything you need to understand RA and have an informed conversation with your doctor.
If you would like to compare rheumatoid arthritis with other joint conditions, read our related guides on gout and psoriatic arthritis.
What are the next steps after learning about rheumatoid arthritis?
Read a related guide — Compare RA with gout, bone & joint infections, juvenile idiopathic arthritis, psoriatic arthritis, and reactive arthritis on rinnit.com.
Share your thoughts — Leave a comment below and tell us about your experience with RA.
Disclaimer: This article is for general informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.
Related Reading
ESR (Sed Rate) Test: What It Measures, Normal Range by Age and What High Results Mean explains the blood test used to check for inflammation.
DEXA Scan (DXA Bone Density Test): Uses, Prep, Results and T-Scores: A DXA bone density test can check for bone loss in people with autoimmune diseases or those taking long-term corticosteroids.
Globulin Blood Test: What It Measures, Normal Range and What High or Low Levels Mean explains the blood test that checks protein levels linked to this condition.
Learn more in our guide to Rheumatoid Factor (RF) Test: Normal Range and What a Positive Result Means.
C-Reactive Protein (CRP) Test: Normal Levels, High CRP and What Results Mean explains what this inflammation blood test measures and what high levels mean.
Hand X-Ray: What It Shows, How It's Done and What Results Mean explains the imaging test used to check hand bones for fractures, arthritis and other problems.
References
Mayo Clinic Staff. Rheumatoid arthritis - Symptoms and causes. Mayo Clinic. April 9, 2025. https://www.mayoclinic.org/diseases-conditions/rheumatoid-arthritis/symptoms-causes/syc-20353648
Mayo Clinic Staff. Rheumatoid arthritis - Diagnosis and treatment. Mayo Clinic. April 9, 2025. https://www.mayoclinic.org/diseases-conditions/rheumatoid-arthritis/diagnosis-treatment/drc-20353653
Nakayama Y, et al. Systematic review and meta-analysis for the 2024 update of the Japan College of Rheumatology clinical practice guidelines for the management of rheumatoid arthritis. Mod Rheumatol. 2024;34(6):1079-1094. PMID 38814660. https://doi.org/10.1093/mr/roae049
Xie W, et al. Difficult-to-treat rheumatoid arthritis: systematic review and meta-analysis on global prevalence. Ann Rheum Dis. 2026;85(3):417-424. PMID 41188120. https://doi.org/10.1016/j.ard.2025.10.007
Koller-Smith L, et al. Parity, body mass index, smoking and risk of rheumatoid arthritis: data from the Australian Longitudinal Study on Women's Health. BMC Rheumatol. 2026;10(1). PMID 42083017. https://doi.org/10.1186/s41927-026-00643-x
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