High fever in adults

Viral illnesses such as COVID-19, the common cold, chickenpox, and other respiratory infections can produce fever. Bacterial problems may include cellulitis or acute bronchitis, while travel or animal exposure can point towards infections such as brucellosis. Fever may also occur with inflammation or a medicine reaction. Record when it began, how it changes, and the symptoms that accompany it, such as cough, sore throat, rash, painful urination, abdominal pain, or shortness of breath.

Rest, drink regularly, and wear loose clothing in a comfortable room. Check the temperature consistently and follow the label or a clinician’s advice for any fever medicine, taking account of liver, kidney, stomach, pregnancy, and medicine concerns. Do not combine products containing the same ingredient. Antibiotics do not treat viral illnesses and should not be started without medical advice. Stay away from others when contagious symptoms are present and wash your hands.

Seek emergency care for trouble breathing, chest pain, fainting, new confusion, a seizure, severe dehydration, a stiff neck, or a rapidly spreading rash. Contact a clinician promptly if fever persists, returns after improving, or occurs with severe localised pain, repeated vomiting, or a weakened immune system. Pregnant adults and those with major long-term conditions should seek advice sooner rather than waiting for symptoms to escalate.

Ask what infection or non-infectious cause fits your symptoms, whether an examination or test is needed, which medicines are suitable for you, and how long to monitor the fever. Share travel, sick contacts, new medicines, and any rash or breathing change.