What Is Reactive Arthritis? Symptoms, Causes, Diagnosis & Treatment

Written by Medicover Team and Medically Reviewed by Dr Bhavana Surapareddy , Rheumatologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Reactive arthritis, previously known as Reiter's syndrome, is an inflammatory form of arthritis that develops as a reaction to an infection elsewhere in the body, most commonly in the urinary tract, gastrointestinal tract, or genital tract. It belongs to a group of inflammatory joint disorders called spondyloarthritis, which also includes ankylosing spondylitis and psoriatic arthritis.

Although the infection itself does not spread to the joints, the body's immune response triggers inflammation, leading to joint pain, swelling, and stiffness. In some cases, reactive arthritis may also affect the eyes, skin, and urinary tract. Early diagnosis and appropriate treatment are important to relieve symptoms, prevent long-term joint damage, and improve overall quality of life.

What Are the Types of Reactive Arthritis?

Reactive arthritis is classified according to the type of infection that triggers the inflammatory response. Identifying the underlying infection helps guide treatment and reduce the risk of recurrence.

Types of Reactive Arthritis

There are several types of reactive arthritis, categorized based on the infection that triggers the condition:

Post-enteric Reactive Arthritis: Triggered by gastrointestinal infections, commonly caused by bacteria such as Salmonella, Shigella, Yersinia, and Campylobacter.
Post-venereal Reactive Arthritis: Triggered by sexually transmitted infections, most commonly Chlamydia trachomatis.

What Are the Symptoms of Reactive Arthritis?

The symptoms of reactive arthritis typically appear within 1 to 4 weeks after the initial infection. The severity and combination of symptoms vary among individuals, but they most commonly affect the joints, eyes, urinary tract, and skin.

Joint Pain and Swelling: Affects the knees, ankles, and feet.
Inflammation of the Eyes: Conjunctivitis or uveitis.
Urinary Symptoms: Painful urination or increased frequency of urination.
Skin Rashes and Mouth Sores: Keratoderma blennorrhagica (skin rash) and oral ulcers.

Additional Symptoms

Enthesitis: Inflammation at the sites where tendons or ligaments attach to bone.
Dactylitis: Swelling of an entire finger or toe, giving it a sausage-like appearance.
Back Pain: Particularly in the lower back.

What Causes Reactive Arthritis?

Reactive arthritis is caused by an infection in another part of the body. The immune system's response to this infection leads to inflammation in the joints. While the exact mechanism is not fully understood, it is believed that the immune system mistakenly attacks the joints in response to the presence of bacteria or bacterial antigens.

Genetic Factors

Genetic predisposition plays a significant role in the development of reactive arthritis. The HLA-B27 gene is strongly associated with an increased risk of developing this condition. Individuals who carry this gene are more susceptible to reactive arthritis following an infection.

When Should You See a Doctor for Reactive Arthritis?

Early medical evaluation by a Rheumatologist is important if you develop joint pain, swelling, or other symptoms following a gastrointestinal, urinary, or sexually transmitted infection. Prompt diagnosis and treatment can help relieve symptoms, reduce inflammation, and prevent long-term joint damage and other complications.

You should see a doctor if you have:

Joint pain, swelling, or stiffness that develops within a few weeks after an infection.
Persistent eye redness, painful urination, or skin rashes along with joint symptoms.
Symptoms that interfere with walking, daily activities, or continue to worsen.

Get medical help immediately if:

Severe joint pain with inability to bear weight.
Sudden vision changes, severe eye pain, or marked eye redness.
High fever, rapidly worsening swelling, or signs of a severe infection.

These could be signs of a serious complication of reactive arthritis that requires prompt medical care.

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How is Reactive Arthritis Diagnosed?

Diagnosing reactive arthritis can be challenging due to the variability of symptoms and their overlap with other conditions. A thorough medical history, physical examination, laboratory tests, and imaging studies help identify the condition and rule out other causes of joint inflammation.

Laboratory Tests

Blood Tests: To check for markers of inflammation (e.g., C-reactive protein, erythrocyte sedimentation rate) and the presence of the HLA-B27 gene.
Urine and Stool Tests: To identify underlying infections.

Imaging Studies

X-rays: To detect joint damage and rule out other conditions.
MRI and Ultrasound: To assess the extent of inflammation in the joints and surrounding tissues.

What is the Treatment for Reactive Arthritis?

The treatment of reactive arthritis focuses on controlling inflammation, relieving symptoms, treating the underlying infection when present, and maintaining joint function. Treatment plans are individualized based on symptom severity and disease progression.

Medications

Antibiotics: To treat the initial infection that triggered the arthritis.
Nonsteroidal Anti-inflammatory Drugs (NSAIDs): To reduce pain and inflammation.
Corticosteroids: For severe inflammation, administered orally or via injection.
Disease-Modifying Antirheumatic Drugs (DMARDs): Such as sulfasalazine or methotrexate, for chronic or severe cases.
Biologic Agents: TNF inhibitors like etanercept or infliximab for refractory cases.

Physical Therapy

Physical therapy plays a crucial role in maintaining joint function and mobility. Exercises tailored to the individual's needs can help reduce stiffness and improve strength.

Lifestyle Modifications

Rest and Joint Protection: To minimize stress on affected joints.
Healthy Diet: To support overall health and reduce inflammation.
Smoking Cessation: Smoking can exacerbate symptoms and hinder treatment effectiveness.

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How Can Reactive Arthritis Be Prevented?

Preventing reactive arthritis involves reducing the risk of infections that can trigger the condition. Practicing good hygiene, following food safety measures, and seeking prompt treatment for infections can help lower the risk of developing reactive arthritis.

Good Hygiene Practices: Proper handwashing and food safety measures to prevent gastrointestinal infections.
Safe Sexual Practices: Using condoms and regular screening for sexually transmitted infections.
Prompt Treatment of Infections: Early treatment of infections to prevent complications.

What Are the Risk Factors for Reactive Arthritis?

Several factors can increase the likelihood of developing reactive arthritis after an infection. Understanding these risk factors may help identify individuals who require closer monitoring and early treatment.

Carrying the HLA-B27 gene.
Recent gastrointestinal or urinary tract infection.
Sexually transmitted infections, especially Chlamydia trachomatis.
Young adults, particularly between 20 and 40 years of age.
Male sex, especially in sexually acquired reactive arthritis.

What Are the Complications of Reactive Arthritis?

Although many people recover within a few months, some individuals may develop persistent or recurrent symptoms. Early treatment helps reduce the risk of long-term complications.

Chronic arthritis or recurrent joint inflammation.
Permanent joint damage.
Persistent eye inflammation that may affect vision.
Chronic back pain or sacroiliitis.
Reduced mobility and impaired quality of life.

How is Reactive Arthritis Managed?

Long-term management focuses on controlling inflammation, preventing flare-ups, maintaining joint mobility, and monitoring for complications. Regular follow-up with healthcare providers helps optimize treatment and improve long-term outcomes.

Take medications exactly as prescribed.
Continue regular physical therapy and exercise.
Avoid smoking and maintain a healthy weight.
Treat infections promptly to reduce recurrence risk.
Attend regular follow-up appointments with your healthcare provider.

How Can You Live With Reactive Arthritis?

Living with reactive arthritis can be challenging, but with appropriate management, individuals can lead active and fulfilling lives. It's essential to work closely with healthcare providers to monitor the condition and adjust treatment as needed.

Support and Resources

Patient Support Groups: Connecting with others who have similar experiences can provide emotional support and practical advice.
Educational Resources: Staying informed about the condition and treatment options empowers individuals to make informed decisions about their health.

What is the Outlook for Reactive Arthritis?

With early diagnosis, appropriate treatment, lifestyle modifications, and regular follow-up, many people with reactive arthritis are able to manage symptoms effectively and maintain good joint function. Prompt treatment of triggering infections and adherence to medical advice can further improve long-term outcomes.

Frequently Asked Questions

1. What causes reactive arthritis?

Reactive arthritis is triggered by a bacterial infection, most commonly affecting the gastrointestinal, urinary, or genital tract. Common triggers include infections caused by Chlamydia trachomatis, Salmonella, Shigella, Campylobacter, and Yersinia.

2. How is reactive arthritis treated?

Treatment includes nonsteroidal anti-inflammatory drugs (NSAIDs), corticosteroids when needed, disease-modifying antirheumatic drugs (DMARDs) for persistent disease, physical therapy, and antibiotics if there is an active underlying bacterial infection.

3. How can reactive arthritis be prevented?

Prevention includes practicing good food hygiene, preventing sexually transmitted infections through safer sex practices, and seeking prompt treatment for gastrointestinal or urinary tract infections.

4. What are the symptoms of reactive arthritis?

Symptoms commonly include joint pain, swelling, stiffness, heel pain, inflammation of tendons, eye inflammation (conjunctivitis or uveitis), painful urination, and skin or mouth lesions.

5. How is reactive arthritis diagnosed?

Diagnosis is based on medical history, physical examination, blood tests for inflammation, testing for recent or current infections, joint fluid analysis to exclude other causes, imaging studies, and, in some cases, HLA-B27 testing.

6. Is reactive arthritis curable?

Reactive arthritis often improves within 3 to 12 months, and many people recover completely. However, some individuals develop recurrent episodes or chronic arthritis that requires ongoing treatment.

7. What is the difference between reactive arthritis and rheumatoid arthritis?

Reactive arthritis develops after a bacterial infection and usually affects large joints of the lower limbs, often with eye or urinary symptoms. Rheumatoid arthritis is an autoimmune disease that typically causes symmetrical inflammation of multiple joints, especially the hands and feet, and is not triggered by an infection.

8. How do you confirm reactive arthritis?

There is no single confirmatory test. Diagnosis is made by combining clinical findings with evidence of a recent infection, blood tests showing inflammation, tests for infectious organisms, joint fluid analysis to rule out other forms of arthritis, imaging studies, and sometimes HLA-B27 testing.