What does fatigue feel like with influenza?

The tiredness may appear with fever, chills, headache, muscle aches, cough, sore throat, or a strong feeling of being unwell. Walking across a room, preparing food, or concentrating may take more effort than usual. Fatigue can continue while the other symptoms improve, and the intensity varies between people. A symptom pattern alone cannot distinguish influenza from every other respiratory infection.

Rest, drink fluids regularly, and choose easy-to-eat foods. Keep activity light and return to normal routines gradually as strength returns. Follow local advice about reducing spread, particularly around people at higher risk. A clinician can advise whether antiviral treatment or an examination is appropriate, especially if symptoms started recently or you have an ongoing medical condition.

Get urgent help for difficulty breathing, chest pain, blue or grey lips, new confusion, inability to wake, severe dehydration, or a sudden worsening after initial improvement. Seek medical advice promptly for persistent high fever, worsening cough, or fatigue that prevents basic care.

Ask whether your symptoms fit influenza, whether testing or antiviral treatment is useful, and when it is safe to resume usual activities.