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Overview

What Is Rheumatoid Arthritis?

Rheumatoid arthritis is a chronic autoimmune disease and type of inflammatory arthritis that causes joint pain, swelling and stiffness. The immune system mistakenly attacks the lining of the joints, leading to ongoing inflammation. It can affect people of different ages, but it is more common in adults and women. Without effective treatment, inflammation may affect movement and damage the joints over time.

Symptoms

Rheumatoid Arthritis Symptoms

  • Joint pain, especially in the hands, wrists, feet or other smaller joints.
  • Joint swelling caused by inflammation.
  • Warmth over an affected joint.
  • Tenderness when a joint is touched or used.
  • Morning stiffness that may last longer than typical stiffness after sleep.
  • Reduced joint movement or difficulty using the affected joint.
  • Fatigue or unusual tiredness.
  • Fever or a mildly raised temperature.
  • Muscle weakness or general weakness.
  • Symptoms outside the joints, such as dry eyes, dry mouth, skin changes or shortness of breath.

Causes

Causes of Rheumatoid Arthritis

Rheumatoid arthritis develops when an abnormal immune response causes ongoing inflammation in the lining of a joint. Over time, this inflammation can damage cartilage, bone and the tissues that support the joint, leading to pain, stiffness and reduced function.

Rheumatoid arthritis is not contagious. It usually results from a combination of genetic susceptibility and environmental or lifestyle influences rather than one proven trigger. Researchers continue to study how immune, hormonal and environmental factors interact in different people.

Risk Factors

Rheumatoid Arthritis Risk Factors

  • Family history of rheumatoid arthritis or another autoimmune disease may increase risk.
  • Being older is associated with a higher likelihood of developing rheumatoid arthritis, although it can occur at any age.
  • Being female is associated with a higher risk than being male.
  • Smoking can increase the risk and may contribute to more severe inflammatory arthritis.
  • Exposure to certain environmental irritants may be associated with rheumatoid arthritis in some people.
  • Some genetic traits may make an abnormal immune response more likely.
  • Hormonal factors may influence risk, although their role is not fully understood.

Complications

Rheumatoid Arthritis Complications

  • Permanent joint damage or deformity can develop when inflammation is not adequately controlled.
  • Reduced mobility may make walking, gripping or other daily activities more difficult.
  • Osteoporosis may occur because of inflammation, reduced activity or other contributing factors.
  • Cardiovascular disease risk may be increased by long-term systemic inflammation.
  • Inflammation can affect the lungs, causing problems such as scarring or shortness of breath.
  • Eye inflammation can cause pain, redness, light sensitivity or vision changes.
  • Rheumatoid arthritis or its medicines may increase susceptibility to some infections.
  • Pain, fatigue and reduced function can affect mood, work, relationships and daily participation.

Reducing risk

Ongoing monitoring matters

Controlling inflammation and attending regular follow-up appointments can reduce the risk of complications. Some problems may also be related to medicines or other health conditions, so tell your clinician about new or worsening symptoms.

Diagnosis

How Rheumatoid Arthritis Is Diagnosed

A clinician reviews the pattern and duration of symptoms and examines the joints for swelling, warmth, tenderness and reduced movement. Because no single test confirms rheumatoid arthritis, the clinician combines the examination with the medical history and may refer you to a rheumatologist.

  • Rheumatoid factor and anti-CCP antibody blood tests can provide evidence that supports a diagnosis.
  • Inflammation markers, such as C-reactive protein or an erythrocyte sedimentation rate, can show the level of inflammation.
  • A complete blood count may be used to check for anemia or other blood abnormalities when appropriate.
  • X-rays can show changes or damage in the joints over time.
  • Ultrasound can detect inflammation and fluid in joints and tendons.
  • MRI can identify inflammation and early joint damage that may not appear on an X-ray.

Treatment & Management

Rheumatoid Arthritis Treatment and Management

Rheumatoid arthritis treatment is individualized and aims to reach low disease activity or remission, prevent joint damage, relieve symptoms and preserve function. There is no guaranteed permanent cure, but early treatment can control the disease and protect mobility. A rheumatology team may adjust the plan over time according to symptoms, examination findings and test results.

  • Disease-modifying antirheumatic drugs, such as methotrexate, help reduce inflammation and slow joint damage.
  • Biologic or targeted therapies may be prescribed when conventional medicines do not control the disease sufficiently.
  • Short-term anti-inflammatory medicines or corticosteroids may be used when prescribed to manage symptoms or a flare.
  • Physical and occupational therapy can improve strength, movement, joint protection and daily function.
  • Regular, appropriate exercise can support mobility, muscle strength and overall health.
  • Stopping smoking can support treatment and may reduce disease-related risks.
  • Surgery may be considered when severe joint damage causes persistent pain or major loss of function.

Treatment safety

Follow-up is part of treatment

Rheumatoid arthritis medications require regular follow-up and, for some medicines, laboratory monitoring. Do not start or stop a medicine without speaking with the prescribing clinician. Your care team may also discuss vaccination and steps to reduce infection risk.

Outlook and Prognosis

Rheumatoid Arthritis Outlook and Prognosis

Rheumatoid arthritis is usually a lifelong condition with periods of flares and improvement. Modern treatment can substantially reduce inflammation and protect function for many people, especially when treatment begins early and is monitored regularly. The course varies, so a rheumatologist can help adjust care as symptoms change.

Why do people talk about four stages of rheumatoid arthritis?

When Should You See a Doctor

When Should You See a Doctor for Rheumatoid Arthritis?

  • Arrange a medical evaluation for joint pain or swelling that lasts several weeks.
  • Seek assessment for morning stiffness that is prolonged or keeps returning.
  • Ask for medical advice when symptoms affect joints on both sides of the body.
  • Make an appointment if fatigue, weakness or reduced function is getting worse.
  • Contact your clinician if symptoms return after a period of good control.

Seek medical care

Some symptoms need prompt attention

Contact a clinician promptly for a severe flare, a hot or very painful joint with fever, new chest pain or shortness of breath, sudden weakness, or signs of a serious medication reaction or infection. Seek emergency care when symptoms are severe or rapidly worsening.

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