What should you know about red fever?

Fever is the body’s response to an immune trigger. Viral illnesses such as a common cold, COVID-19, bronchiolitis, croup, or acute bronchitis can cause it. Bacterial infections, including cellulitis or brucellosis, are other possible causes. Chickenpox may also produce fever with an itchy rash. The temperature alone cannot identify the cause; age, medical history, how suddenly it began, and symptoms such as cough, breathing trouble, pain, rash, vomiting, or urinary symptoms all matter.

Rest, drink fluids regularly, and wear light clothing in a comfortable room. Check how you feel rather than trying to force the temperature down with cold baths or heavy blankets. If you use a fever medicine, follow the product directions and check that it is suitable for the person’s age, pregnancy status, and medical conditions. Do not give children aspirin unless a clinician specifically advises it. Keep a note of when the fever began and any new symptoms.

Get urgent medical help for difficulty breathing, confusion, a seizure, severe weakness, a stiff neck, a purple or rapidly spreading rash, repeated vomiting, or signs of dehydration such as very little urine. Seek prompt advice for a baby with fever, an older adult who becomes unusually drowsy, or anyone with a weakened immune system. Arrange a medical review when fever persists, returns after improving, or occurs with a focused symptom such as chest pain or severe abdominal pain.

Ask what cause is most consistent with the full symptom pattern, whether testing is needed, which fever medicine is appropriate, and what change should prompt reassessment.