Rheumatoid arthritis is commonly found in working-age and middle-aged adults, especially in women, who have a 2–3 times higher risk than men. If left untreated, cartilage and joints will be permanently damaged, leading to disability and a reduced quality of daily life. If diagnosed early and treated continuously by a specialist, disease progression can be slowed and severity reduced.
How does the body’s joint system work?
A joint is the area where two bones meet, allowing the body to move smoothly. Within a joint are several important components, including:
- Articular cartilage acts as a cushion to absorb impact and reduce friction.
- Synovial membrane produces synovial fluid to lubricate and deliver nutrients to cartilage.
- Synovial fluid a clear, viscous fluid that reduces friction between bones.
- Ligaments and tendons help support and stabilize the joint.
In rheumatoid arthritis, the immune system attacks the synovial membrane first, causing chronic inflammation and eventually destroying cartilage and surrounding bone.
What is rheumatoid arthritis?
Rheumatoid arthritis (RA) is a disease in which the body’s immune system becomes abnormal and attacks its own tissues—especially the synovial membrane—causing chronic inflammation, joint swelling, and pain. If left untreated, it can lead to permanent joint destruction. This differs from osteoarthritis, which is caused by age-related wear and tear, or systemic lupus erythematosus (SLE), an autoimmune disease in which the immune system damages the body’s organs and tissues, affecting other parts of the body such as the eyes and muscles—not just the joints.
Causes of rheumatoid arthritis
At present, the exact cause is still unknown, but it may result from a combination of factors, including:
- Genetic factors certain genes, such as HLA-DR4, increase risk.
- Environmental factors such as viral or bacterial infections and smoking.
- Hormonal factors more common in women than men and associated with sex hormones.
Types of rheumatoid arthritis
Rheumatoid arthritis can be classified by disease course as follows:
- Seropositive positive blood test; rheumatoid factor (RF) or anti-CCP is detected in the blood. This is the most common type, accounting for about 60%–80% of patients, and symptoms are often more severe.
- Seronegative negative blood test; RF or anti-CCP is not detected. Symptoms resemble typical RA but often involve pain in small joints such as the wrists and finger joints. Found in about 20%–30%.
- Juvenile idiopathic arthritis (JIA) arthritis in children under 16 years of age with mechanisms similar to adult RA.
- Rheumatoid arthritis with extra-articular manifestations inflammation affecting organs other than joints, such as the lungs, heart, eyes, and skin; often found in cases with high disease severity.
Symptoms of rheumatoid arthritis
In early stages, rheumatoid arthritis often has unclear symptoms or may be mistaken for general fatigue, causing many patients to miss timely diagnosis and treatment. Warning signs include:
Joint symptoms:
- Morning stiffness lasting longer than 1 hour, a key sign of rheumatoid arthritis.
- Swollen, red, warm, and painful joints.
- Symptoms often occur on both sides at the same time, such as both wrists.
- Finger joints—especially the knuckle joints and the middle finger joints—are most commonly affected.
- In advanced stages, joint deformities may occur, such as abnormal bending of the fingers.
Whole-body symptoms:
- Chronic fatigue
- Low-grade fever
- Weight loss
- Loss of appetite
Extra-articular symptoms:
- Rheumatoid nodules under the skin, especially at the elbows
- Dry eyes, red eyes
- Anemia
- Inflammation of the lining of the lungs or heart in severe cases
Risk groups to watch for
Rheumatoid arthritis can occur in any group, but some groups have a higher risk than the general population.
- Women have a 2–3 times higher risk than men, especially ages 30–60, believed to be related to estrogen.
- Those with a family history of rheumatoid arthritis are at higher risk due to genetic factors.
- Smokers nicotine and toxins in cigarettes stimulate abnormal immune activity, increasing risk and worsening disease severity.
- People who are overweight excess fat produces inflammatory substances that can trigger abnormal immune function.
- Those with a history of certain infections such as herpes-group viruses (Epstein-Barr virus) or parvovirus may be triggers.
- Those exposed to certain chemicals such as silica or asbestos in the work environment.
Medical research has found that pregnancy can partially protect against rheumatoid arthritis. Most pregnant womenhave reduced symptoms or remission during the 2nd or 3rd trimester due to hormonal adjustments and immune mechanisms that prevent rejection of the fetus, causing autoimmune activity to temporarily subside.
Complications of rheumatoid arthritis
Rheumatoid arthritis may increase health risks as follows:
- Osteoporosis bone deterioration and fragility due to medications used to treat RA.
- Carpal tunnel syndrome (median nerve compression) due to inflammation leading to nerve compression.
- Cardiovascular disease such as vasculitis coronary artery blockage, pericarditis
- Lung disease pleuritis and pulmonary fibrosis, causing shortness of breath and difficulty breathing.
- Lymphoma and other types of lymphoid tissue cancers.
- Sjögren’s syndrome autoimmune attack on the body’s tissues dry eyes, dry mouth, conjunctivitis
- Easy infections and severe infections because immunity is weakened by medications used to treat the disease.
- Tendon rupture especially tendons on the back of the fingers.
Diagnosis of rheumatoid arthritis
A rheumatology specialist uses various diagnostic criteria depending on symptoms and severity, including:
- History-taking and physical examination
- Assess external signs by evaluating characteristics, location, and duration of joint inflammation.
- Check the number of swollen and tender joints.
- Blood tests
- Testing rheumatoid factor (RF) to detect a type of antibody the body produces to attack itself; often found in RA patients.
- Testing for antibodies to anti-CCP or ACPA to diagnose early-stage rheumatoid arthritis.
- Measuring erythrocyte sedimentation rate in 1 hour (Erythrocyte Sedimentation Rate: ESR) and checking protein levels (C-Reactive Protein: CRP) to detect inflammation or tissue damage in the body.
- Complete blood count (Complete Blood Count: CBC) to detect anemia, which commonly co-occurs with RA.
- Imaging studies
- X-ray — to detect bone erosion and narrowing of joint spaces.
- Ultrasound — to detect joint fluid and synovial inflammation in early stages before it appears on X-ray.
- MRI — to detect abnormalities in bone and soft tissue in detail.
Treatment options for rheumatoid arthritis
Rheumatoid arthritis cannot yet be cured, but treatment can relieve symptoms. The current treatment goal is Treat-to-Target (T2T), meaning aiming for remission or a controllable disease state to prevent long-term joint damage. Treatment methods vary depending on severity as follows:
- Non-drug therapy In early-stage RA, physical therapy can help keep joints flexible, restore muscles and surrounding joints, and prevent further joint destruction. This must follow the recommendations of a physician and physical therapist. Aerobic exercise helps prevent joints from stiffening and improves mobility. Support braces may be used as appropriate.
- Medications for rheumatoid arthritis include:
- Steroids for severe inflammation; may have serious side effects; dose is reduced when symptoms improve.
- Non-steroidal anti-inflammatory drugs (NSAIDs) effective for relieving joint pain and swelling with fast results.
- Slow-acting anti-inflammatory drugs must be taken continuously only as directed by a physician.
- Surgery for rheumatoid arthritis In cases where joints are severely damaged and cannot be treated by other methods, surgery may be performed to treat rheumatoid arthritis and reduce long-term joint damage. Methods include joint fusion, synovectomy, tendon repair around the joint, and joint replacement, depending on the patient’s symptoms and severity.
Preparing before seeing a doctor and before treatment
Preparing complete information can help the doctor diagnose and treat more precisely.
- Record symptoms — specify which joints are painful/swollen, how long it has lasted, and how many minutes morning stiffness lasts.
- Compile health history — including underlying conditions, family history, and all current medications.
- Stop smoking — because cigarettes can reduce the effectiveness of certain medications, especially biologics.
- Basic health screening — the doctor may order blood tests, X-ray, or ultrasound before starting medication.
- Avoid buying painkillers to take on your own — without consulting a doctor, as it may mask symptoms and make diagnosis more difficult.
- Inform any drug allergy history — especially before using DMARDs and biologics.
Self-care after treatment
Medication care:
- Take medications or injections strictly on schedule. Do not stop medication on your own even if symptoms improve, because RA requires long-term continuous treatment.
- Regularly follow up on blood test results as scheduled to monitor medication side effects such as liver values, kidney values, and blood cells.
Exercise and physical therapy:
- Do low-impact exercise such as swimming, cycling, or yoga to maintain muscle strength around joints without stressing the joints.
- Do physical therapy according to the program designed by a physical therapist.
- Avoid overexertion during flare-ups.
Joint care:
- Use joint splints or support devices as recommended by the doctor.
- Apply heat to reduce stiffness and cold to reduce swelling, as advised by the doctor.
Mental health care:
- RA can affect mental health. If you feel stressed, anxious, or depressed, consult a doctor.
Infection prevention:
- Patients using biologics or JAK inhibitors will have reduced immunity. Avoid crowded places during influenza outbreaks and get vaccinations as advised by the doctor, such as the influenza vaccine and pneumonia vaccine.
Foods suitable for rheumatoid arthritis patients
Dietary choices are very important in reducing pain and inflammation in RA patients, including:
- Foods to eat
- Fish because it contains omega-3 fats and high antioxidants that help inhibit inflammation, such as salmon, tuna, and mackerel.
- Colorful fruits and vegetables help inhibit inflammation throughout the body and in joints, such as berries, broccoli, oranges, and apples.
- Olive oil contains no omega-6 fats that can stimulate inflammation, but should be consumed in appropriate amounts.
- Whole grains help fight inflammation and relieve pain, such as brown rice, oats, and barley.
- Legumes reduce pain and inflammation and provide protein to strengthen muscles around the joints.
- Drink plenty of water because dehydration may increase joint pain or tightness.
- Foods to avoid
- Processed foods because they are high in salt and sodium, such as instant noodles, fermented foods, pickled foods, red meat, sausage, ham, and bacon.
- Trans fats because they stimulate inflammation, such as fried foods, fast foods, and crunchy snacks.
- High-sugar foods because they cause inflammation and free radicals, such as soft drinks, milk tea, and sweets.
- High-starch foods because they can trigger flare-ups and cause weight gain, such as bread, pasta, and pizza.
- Alcoholic beverages should be strictly avoided because they worsen inflammation and interfere with the action of certain medications.
Prevention and slowing disease progression
Although there is still no complete way to prevent rheumatoid arthritis, lifestyle adjustments can reduce risk and slow progression.
- Quit smoking — because smoking is the most important modifiable risk factor.
- Maintain a healthy weight based on BMI (Body Mass Index).
- Exercise regularly, at least 150 minutes per week of moderate-intensity activity.
- Eat foods high in omega-3 from marine fish, olive oil, nuts, and colorful fruits and vegetables.
- Manage stress with meditation, yoga, or enjoyable activities, as stress can trigger inflammation.
- Get enough rest, at least 7–8 hours per night, to allow the body to recover.
- Have annual checkups and see a doctor promptly if joint swelling and pain persist for more than 6 weeks, especially in high-risk individuals.
Frequently asked questions about rheumatoid arthritis (FAQ)
Can rheumatoid arthritis be completely cured?
Currently, there is no way to completely cure rheumatoid arthritis, but it can be controlled into remission. Many patients can live normally if they receive correct and continuous treatment. The key goal is to prevent joint damage and maintain quality of life. Stopping medication on your own without consulting a doctor may cause flare-ups and permanent joint damage.
How is rheumatoid arthritis different from osteoarthritis?
Rheumatoid arthritis is an autoimmune disease caused by the immune system attacking the joints. It is often found in younger to middle-aged people, commonly involves prolonged morning stiffness, and occurs on both sides. Osteoarthritis is caused by age- and use-related wear and tear, often found in older adults, and symptoms usually improve after resting the joint. Treatments for the two conditions are completely different, so accurate diagnosis is very important.
Can rheumatoid arthritis patients become pregnant?
Rheumatoid arthritis patients can become pregnant, but careful planning with a doctor is necessary because treatment may involve certain medications such as methotrexate and leflunomide, which pose risks to the fetus and must be stopped in advance before pregnancy. However, in many cases RA symptoms improve during pregnancy due to hormonal changes, but often flare after delivery. Care from an experienced medical team is important.
Can rheumatoid arthritis affect organs other than the joints?
Yes. Rheumatoid arthritis is not only a joint disease; it affects the whole body. Possible extra-articular manifestations include lung disease, pericarditis, dry and red eyes, anemia, and rheumatoid nodules under the skin. There is also a higher risk of cardiovascular disease than in the general population, so comprehensive holistic care is required.
How long do I need to take medication?
In general, rheumatoid arthritis requires long-term medication; some people may need it for life because stopping medication even after remission carries a high risk of flare-ups and permanent joint damage. However, in patients with sustained and complete remission, the doctor may consider gradually reducing the dose with close monitoring. Do not stop medication on your own.
When should I see a rheumatoid arthritis specialist?
See a specialist promptly if you have swollen, red, warm, and painful joints, especially in finger joints, wrists, or ankles on both sides, along with morning stiffness lasting longer than 30–60 minutes for more than 6 weeks, and chronic fatigue, low-grade fever, or weight loss. Early diagnosis and starting medication within 3–6 months from symptom onset provides the best outcomes in preventing permanent disability.
Hospital specialized in rheumatoid arthritis treatment
The Rheumatology and Autoimmune Disease (Internal Medicine) Center, Bangkok Hospital provides comprehensive care for rheumatoid arthritis and autoimmune diseases, from diagnosis through long-term treatment, by a team of rheumatology specialists with modern technology. Treatment follows the Treat-to-Target (T2T) approach in accordance with international standards, along with individualized physical therapy programs to control the disease, reduce symptoms, and help patients achieve a better quality of life.
