What does unexplained fever feel like with acute myeloid leukaemia?

Acute myeloid leukaemia can affect the bone marrow's production of infection-fighting blood cells. Fever may occur when the body is responding to infection or inflammation, and the cause is not always obvious from the way you feel. Some episodes build gradually; others begin with chills followed by warmth, sweating, weakness, or aching muscles. A thermometer reading matters because fever can be significant even when symptoms seem mild.

Check your temperature with a reliable thermometer and write down the reading, time, chills, medicines, and other symptoms. Contact your oncology team promptly for instructions, especially if you have a current or possible diagnosis of acute myeloid leukaemia. Do not take leftover antibiotics or delay advice while waiting for the fever to settle. Use only fever medicine your clinical team has approved, because some medicines can hide a change in symptoms.

Seek urgent medical assessment for a measured fever or new chills if your cancer team has given you a fever threshold, or if you feel suddenly unwell. Go urgently for trouble breathing, confusion, faintness, severe weakness, chest pain, persistent vomiting, or a rapidly worsening condition. People with acute myeloid leukaemia may have a reduced ability to fight infection, so a small-looking change can need prompt review.

Ask which temperature reading should trigger a call, where to go outside clinic hours, and whether to take paracetamol before assessment. Ask how to record symptoms and which signs may suggest infection despite no obvious source.