Fever gone in the morning and back at night

Body temperature naturally changes across the day, and blankets, room temperature, activity, and fluid intake can affect readings. Fever medicine may also wear off, making the temperature rise again. A recurring pattern can occur while the immune system is responding to an infection; the pattern by itself does not identify the cause. Cough, sore throat, burning urine, diarrhoea, a rash, pain, or a wound change can provide more useful clues.

Use the same thermometer and method each time, ideally recording readings before fever medicine. Note the time, chills or sweating, fluid intake, urine, sleep, breathing, pain, and any new symptom. Offer fluids, rest, and light clothing; avoid ice baths. Use fever medicine only when appropriate for the person and according to advice from a pharmacist or clinician. Do not alternate medicines unless a healthcare professional has given a clear plan.

Seek urgent help for difficulty breathing, blue or grey lips, confusion, a seizure, a stiff neck, severe dehydration, a rapidly spreading rash, or a person who is difficult to wake. Arrange prompt assessment for a young infant with fever, repeated vomiting, severe pain, worsening weakness, or fever that keeps returning or is not improving. Depending on the accompanying symptoms, a clinician may consider illnesses such as Acute Bronchitis, Bronchiolitis, Cellulitis, or COVID-19.

Bring your temperature log and ask what pattern is concerning, whether testing is needed, how long home monitoring is reasonable, and which symptoms should change the urgency of care.