What should you know about heavy fever?

Fever commonly accompanies infections affecting the airways, skin, or other parts of the body. A person may also feel chilled, tired, achy, sweaty, or thirsty. The temperature alone does not identify the cause; the pattern of symptoms matters. Possible illnesses include a common cold, acute bronchitis, COVID-19, chickenpox, cellulitis, bronchiolitis, croup, or brucellosis. Infants, older adults, pregnant people, and people with weakened immunity may need earlier advice.

Rest and take frequent sips of water or an oral rehydration drink if you can swallow normally. Wear light clothing and keep the room comfortably cool; avoid ice baths and heavy blankets. Check for changes in alertness, breathing, urine output, rash, pain, and the ability to drink. Fever medicines may help discomfort, but use only a product suitable for the person and follow its label or a clinician’s instructions. Do not give aspirin to children or teenagers unless a clinician specifically advises it.

Seek urgent help for trouble breathing, blue or grey lips, a seizure, severe drowsiness, confusion, a stiff neck, a rapidly spreading rash, severe dehydration, or intense pain. A baby with a fever, a person with a weakened immune system, or anyone whose fever persists or worsens should receive prompt medical advice. Arrange assessment when the illness is not improving or new symptoms develop.

Ask what may be causing the fever, which warning signs matter for this person, how often to check temperature, and which medicine and dose are appropriate. Mention recent travel, sick contacts, new medicines, chronic conditions, and any rash, cough, pain, or urinary symptoms.