Most people associate the flu with fever, cough, or a runny nose. However, seasonal influenza can also cause widespread muscle and joint pain throughout the body. The influenza virus not only attacks the respiratory system but also affects the immune system, triggering an inflammatory response that leads to muscle aches and joint pain.

For people with musculoskeletal conditions such as rheumatoid arthritis, ankylosing spondylitis, or osteoarthritis, influenza infection may result in persistent pain, muscle weakness, and joint inflammation, while also triggering flare-ups and worsening existing symptoms.

According to physicians, as the body fights the influenza virus, the immune system produces cytokines—small proteins that can break down proteins in muscle tissue. This may cause prolonged muscle aches and pain in older adults with influenza.

Who Should Be Especially Cautious?

• Older adults
• Young children
• Pregnant women
• Healthcare workers
• People with underlying conditions, such as rheumatoid arthritis or autoimmune arthritis

These groups are at a higher risk of contracting influenza and developing complications. Influenza can worsen musculoskeletal diseases and may also lead to heart and lung complications.

To protect yourself and your family, everyone aged 6 months and older should receive an annual influenza vaccination. In addition, wash your hands frequently, cover your mouth and nose when coughing or sneezing, avoid crowded places during flu season, and seek medical attention if your illness persists or if unusual symptoms develop.

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