Understanding Rheumatoid Arthritis

What is Rheumatoid Arthritis?

Rheumatoid arthritis (RA) is a chronic autoimmune disease that primarily affects the joints. Unlike osteoarthritis, which results from wear and tear on the joints, rheumatoid arthritis occurs when your immune system mistakenly attacks your body's tissues.

In RA, the immune system targets the synoviumthe lining of the membranes that surround your joints. This causes inflammation that eventually can result in bone erosion and joint deformity. The inflammation associated with rheumatoid arthritis can also damage other parts of the body, including the skin, eyes, lungs, heart, and blood vessels.

Signs and Symptoms

The signs and symptoms of rheumatoid arthritis may vary in severity and may even come and go. Periods of increased disease activity, called flares, alternate with periods of relative remissionwhen the swelling and pain fade or disappear.

Joint Symptoms

• Tender, warm, swollen joints
• Joint stiffness that is usually worse in the mornings and after inactivity
• Fatigue, fever, and loss of appetite
• Affected joints typically include the small joints in the hands, wrists, and feet
• As the disease progresses, symptoms often spread to the wrists, knees, ankles, elbows, hips, and shoulders
• Symptoms usually occur in the same joints on both sides of your body (symmetrical)

Non-Joint Symptoms

About 40% of people with rheumatoid arthritis also experience signs and symptoms that don't involve the joints, such as:

• Skin: Rheumatoid nodulesfirm lumps under the skin
• Eyes: Dryness, pain, inflammation, redness, sensitivity to light
• Lungs: Inflammation and scarring that can lead to progressive shortness of breath
• Heart: Inflammation of the heart sac (pericarditis)
• Blood: Decreased red blood cell count (anemia)
• Nerves: Tingling, numbness, or burning in the hands and feet

Causes and Risk Factors

Rheumatoid arthritis occurs when your immune system attacks the synoviumthe lining of the membranes that surround your joints. The resulting inflammation thickens the synovium, which can eventually destroy the cartilage and bone within the joint.

Risk Factors

Factors that may increase your risk of rheumatoid arthritis include:

• Sex: Women are more likely than men to develop rheumatoid arthritis.
• Age: Rheumatoid arthritis can occur at any age, but it most commonly begins between the ages of 40 and 60.
• Family history: If a member of your family has rheumatoid arthritis, you may have an increased risk of the disease.
• Smoking: Cigarette smoking increases your risk of developing rheumatoid arthritis, particularly if you have a genetic predisposition for developing the disease.
• Excess weight: People who are overweight appear to be at a somewhat higher risk of developing rheumatoid arthritis.
• Environmental exposures: Though poorly understood, certain exposures such as asbestos or silica may increase the risk for developing rheumatoid arthritis.

Genetic Factors

Researchers have identified certain genetic markers that increase a person's risk of developing rheumatoid arthritis. The strongest genetic risk factor for RA is the HLA-DRB1 gene. Other genes that may play a role in the development of RA include:

• PTPN22
• STAT4
• TRAF1-C5
• PADI4

However, having these genetic markers does not guarantee that a person will develop RA, and many people without these markers still develop the condition.

Diagnosis

Diagnosing rheumatoid arthritis can be challenging in its early stages because the early signs and symptoms mimic those of many other diseases. There is no single blood test or physical finding that confirms the diagnosis.

Medical History and Physical Examination

During the physical exam, your doctor will check your joints for swelling, redness, and warmth. He or she will also check your reflexes and muscle strength. Your doctor will ask about your symptoms, family history, and other medical conditions.

Blood Tests

People with rheumatoid arthritis often have an elevated erythrocyte sedimentation rate (ESR) or C-reactive protein (CRP) level, which may indicate the presence of an inflammatory process in the body. Other common blood tests include:

• Rheumatoid factor: An antibody found in about 80% of people with RA
• Anti-cyclic citrullinated peptide (anti-CCP) antibodies: More specific for RA than rheumatoid factor
• Complete blood count: May reveal anemia

Imaging Tests

Your doctor may recommend imaging tests to help track the progression of rheumatoid arthritis in your joints over time. These may include:

• X-rays: To track the progression of the disease
• Ultrasound or MRI: To detect early signs of rheumatoid arthritis
• Dual-energy X-ray absorptiometry (DXA): To measure bone density

Classification Criteria

The American College of Rheumatology uses classification criteria for diagnosing rheumatoid arthritis. These criteria include:

Treatment Options

There is no cure for rheumatoid arthritis, but recent research indicates that remission of symptoms is more likely when treatment begins early with medications known as disease-modifying antirheumatic drugs (DMARDs).

Medications

The types of medications recommended by your doctor will depend on the severity of your rheumatoid arthritis and how well you respond to the medications.

Disease-Modifying Antirheumatic Drugs (DMARDs)

These drugs can slow the progression of rheumatoid arthritis and save the joints and other tissues from permanent damage. Common DMARDs include:

• Methotrexate
• Hydroxychloroquine
• Leflunomide
• Sulfasalazine

Biologic Agents

Biologic DMARDs are usually most effective when paired with a traditional DMARD. They target specific parts of the immune system that trigger inflammation. Options include:

• Abatacept
• Adalimumab
• Anakinra
• Rituximab
• Tocilizumab

Targeted Synthetic DMARDs

These newer medications target specific molecular pathways involved in the immune response:

• Baricitinib
• Tofacitinib
• Upadacitinib

Therapies

Your doctor may also refer you to a therapist who can teach you exercises to help keep your joints flexible:

• Occupational therapy: To learn easier ways to do your normal activities
• Physical therapy: To find new ways to move with less pain

Surgical Procedures

If medications fail to prevent or slow joint damage, you may need surgery to help restore your ability to use your joint. RA surgeries may include:

• Synovectomy (removal of the inflamed joint lining)
• Tendon repair
• Joint fusion
• Total joint replacement

Living with Rheumatoid Arthritis

Living with rheumatoid arthritis isn't easy. The pain and fatigue can make even simple activities challenging. However, with proper treatment and self-care, most people with rheumatoid arthritis can lead full, active lives.

Self-Care Strategies

You can take measures to care for your body if you have rheumatoid arthritis:

• Exercise regularly with low-impact activities like walking or swimming
• Apply heat or cold to relieve pain and reduce inflammation
• Practice relaxation techniques to manage stress
• Maintain a healthy weight to reduce stress on your joints

Diet and Nutrition

Although no specific diet has been proven effective for rheumatoid arthritis, eating an anti-inflammatory diet may help reduce inflammation:

• Include plenty of fruits, vegetables, and whole grains
• Limit saturated fats and trans fats
• Choose sources of healthy fats like avocados, nuts, and olive oil
• Consider following Mediterranean diet principles

Emotional Support

Living with a chronic condition can be emotionally taxing. Consider:

• Connecting with others who have similar experiences
• Talking to a mental health professional
• Staying involved with friends and family
• Pursuing hobbies and interests that are manageable

Work and RA

Most people with rheumatoid arthritis can continue working. To help you stay productive:

• Discuss flexible work arrangements with your employer
• Take regular breaks to move around
• Use ergonomic equipment
• Consider job accommodations if needed