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Arthritis

Arthritis means inflammation or disease of a joint, rather than a single diagnosis. Osteoarthritis, rheumatoid arthritis, gout, infection and other causes have different mechanisms and treatment needs.

At a glance

Quick facts

Category
Musculoskeletal disorders
What it is
Arthritis means inflammation or disease of a joint, rather than a single diagnosis.
Typical presentation
Joint pain, stiffness, warmth, swelling or reduced movement may occur.
Assessment
History, joint examination and targeted blood tests or imaging help narrow the cause.
Treatment approach
Care depends on the subtype and can include physical activity, pain control, rehabilitation and disease-specific medicines.
Key safety concern
A hot, very painful swollen joint with fever is a possible septic arthritis emergency and needs urgent medical assessment.

Names & terminology

Understanding the name

Arthritis means inflammation or disease of a joint, rather than a single diagnosis. Osteoarthritis, rheumatoid arthritis, gout, infection and other causes have different mechanisms and treatment needs.

Clinical reference

Clinical profile

Summary
CategoryMusculoskeletal disorders
What it isArthritis means inflammation or disease of a joint, rather than a single diagnosis.
Typical presentationJoint pain, stiffness, warmth, swelling or reduced movement may occur.
AssessmentHistory, joint examination and targeted blood tests or imaging help narrow the cause.
Treatment approachCare depends on the subtype and can include physical activity, pain control, rehabilitation and disease-specific medicines.
Key safety concernA hot, very painful swollen joint with fever is a possible septic arthritis emergency and needs urgent medical assessment.

Overview

Arthritis means inflammation or disease of a joint, rather than a single diagnosis. Osteoarthritis, rheumatoid arthritis, gout, infection and other causes have different mechanisms and treatment needs.

Symptoms and presentation

Joint pain, stiffness, warmth, swelling or reduced movement may occur. Morning stiffness duration and the pattern of affected joints can provide diagnostic clues.

CLINICAL FEATURES

Presentation and warning signs

The pattern varies and cannot replace an individual assessment.

Clinical overview
Presentation
  • Joint pain
  • stiffness
  • warmth
  • swelling or reduced movement may occur
Clinical assessment
  • History, joint examination and targeted blood tests or imaging help narrow the cause
  • Interpret results with history and examination
When to seek urgent care
  • A hot, very painful swollen joint with fever is a possible septic arthritis emergency and needs urgent medical assessment.

Emergency symptoms and clinical severity should be assessed locally.

Clinical assessment and diagnosis

History, joint examination and targeted blood tests or imaging help narrow the cause. An acutely swollen joint may require aspiration to exclude infection or crystals.

ASSESSMENT

How the clinical assessment proceeds

Exact investigations depend on the clinical context.

Clinical workflow
1Define the symptom patternJoint pain, stiffness, warmth, swelling or reduced movement may occur. Morning stiffness duration and the pattern of affected joints can provide diagnostic clues.
2Assess disease or alternative causesHistory, joint examination and targeted blood tests or imaging help narrow the cause. An acutely swollen joint may require aspiration to exclude infection or crystals.
3Discuss care and monitoringCare depends on the subtype and can include physical activity, pain control, rehabilitation and disease-specific medicines.

Treatment and management

Care depends on the subtype and can include physical activity, pain control, rehabilitation and disease-specific medicines.

Treatment & care hub

Elements of care

Individual treatment is based on diagnosis, comorbidities and clinician assessment.

Management overview
Confirm diagnosisFirst step

Understand the underlying condition

History, joint examination and targeted blood tests or imaging help narrow the cause. An acutely swollen joint may require aspiration to exclude infection or crystals.

Tailor treatmentIndividualized

Choose evidence-based management

Care depends on the subtype and can include physical activity, pain control, rehabilitation and disease-specific medicines.

Monitor safetyImportant

Recognize warning signs

A hot, very painful swollen joint with fever is a possible septic arthritis emergency and needs urgent medical assessment.

Diagnosis→Tailored care→Monitoring

Complications and when to seek help

A hot, very painful swollen joint with fever is a possible septic arthritis emergency and needs urgent medical assessment.

EVIDENCE AND DATA

Interpreting population statistics

Comparable, disease-specific prevalence or incidence data have not yet been curated for this entry. No prevalence estimate is supplied.

MedlinePlus Health Topics ↗
Data availabilityNot quantifiedUse condition-specific epidemiology, not estimated figures
No unsupported regional or country comparison is presented.

Frequently asked questions

What is Arthritis?

Arthritis means inflammation or disease of a joint, rather than a single diagnosis. Osteoarthritis, rheumatoid arthritis, gout, infection and other causes have different mechanisms and treatment needs.

How is it assessed?

History, joint examination and targeted blood tests or imaging help narrow the cause. An acutely swollen joint may require aspiration to exclude infection or crystals.

When should I seek urgent help?

A hot, very painful swollen joint with fever is a possible septic arthritis emergency and needs urgent medical assessment.

Sources

  1. NIAMS — Arthritis and musculoskeletal health ↗

This is an editorial evidence summary awaiting independent clinician review. It is not a diagnosis, a treatment plan, or a substitute for personalized medical care.