What should you know about random fever?

Fever is part of the body's immune response. Viral illnesses such as a common cold, COVID-19, chickenpox, or croup can cause it, while bacterial infections such as cellulitis or acute bronchitis may also present with fever. Brucellosis is another possible cause in people with relevant animal or food exposure. A fever pattern alone cannot identify the cause.

Notice when it began, whether it returns, and whether you also have cough, sore throat, rash, pain, vomiting, diarrhoea, urinary symptoms, or unusual tiredness. These details help a clinician decide whether examination or testing is useful.

Rest, drink fluids regularly, and wear light clothing while you monitor how you feel. Check your temperature with the same thermometer and record the reading and time rather than relying only on feeling hot or cold. Avoid strenuous activity until you are recovering.

Use fever medicine only as directed on its label or by a clinician, taking account of your age, pregnancy, allergies, and other medicines. Do not give aspirin to children or teenagers unless a clinician specifically advises it. Stay home from close contact while you may have a contagious infection.

Seek urgent medical help for trouble breathing, confusion, fainting, a seizure, a stiff neck, a severe headache, a rapidly spreading rash, or inability to keep fluids down. Babies, older adults, pregnant people, and people with weakened immunity may need earlier advice even when symptoms seem mild.

Arrange a medical review when fever keeps returning, lasts longer than expected, or comes with worsening pain, persistent cough, marked weakness, or symptoms after travel. A clinician can assess the pattern and look for the source.

Could my symptoms fit a viral illness or a bacterial infection? Which observations should I record? Do I need an examination or tests, and which fever medicine is suitable with my health conditions?