What should you know about fever for a week?

Fever is a body response, not a diagnosis. A viral illness may cause fever and tiredness, while a bacterial infection can affect the chest, skin, urine, or another area. Examples include acute bronchitis, cellulitis, chickenpox, common cold, COVID-19, or croup; brucellosis may also be considered after relevant animal or food exposure. The pattern matters: record the temperature, how it was measured, chills, cough, rash, pain, breathing changes, bowel symptoms, and recent travel or sick contacts.

Arrange a medical appointment promptly and take your temperature with the same reliable method each time. Rest, drink fluids regularly, wear light clothing, and avoid strenuous activity. Use fever medicine only as directed on its label or by a clinician, checking that combination cold products do not repeat the same ingredient. Do not start leftover antibiotics; they may not treat the cause and can obscure assessment.

Seek urgent care now for trouble breathing, chest pain, confusion, a seizure, fainting, severe dehydration, a stiff neck, a rapidly spreading rash, or severe weakness. Prompt assessment is also needed for an infant, pregnancy, older age, or a weakened immune system. A fever that continues for a week is itself a reason to contact a clinician rather than continuing to monitor it alone.

Ask which causes fit your symptoms and exposures, whether an examination or tests are needed, which fever medicine is suitable for you, and what change should trigger urgent review.