Flu and Skin Pain: Understanding the Connection

Skin Pain with Influenza: Mechanism and Management

Skin hypersensitivity (allodynia) and myalgias are common systemic symptoms of influenza infection.

Why It Happens

• Cytokine storm: Pro-inflammatory cytokines (IL-6, TNF-α, IFN-γ) sensitize peripheral nociceptors and central pain pathways.
• Prostaglandin release: Mediates fever and hyperalgesia.
• Viral myositis: Direct muscle invasion (rare) or immune-mediated inflammation causes deep aching perceived as skin tenderness.

Associated Symptoms

Fever, chills, cough, sore throat, rhinorrhea, headache, fatigue, myalgias, arthralgias.

Management

• Rest and hydration
• OTC analgesics: acetaminophen or NSAIDs (ibuprofen, naproxen) — avoid aspirin in children/teens (Reye's risk)
• Lukewarm baths, loose clothing
• Antivirals (oseltamivir, baloxavir) if started ≤48 hrs — may shorten duration/severity

Red Flags (Seek Care)

• Difficulty breathing, chest pain
• Confusion, persistent dizziness
• Inability to maintain hydration
• Symptoms improving then worsening (secondary bacterial pneumonia)
• High-risk groups: pregnant, elderly, immunocompromised, chronic cardiopulmonary disease

Skin pain typically resolves with the acute illness (3–7 days). Persistent pain warrants evaluation for post-viral syndromes or other etiologies.