Does acute myeloid leukaemia cause unexplained fever?

Acute myeloid leukaemia can disrupt normal blood-cell production. Fever may develop as part of the illness itself, or because reduced healthy white blood cells make infection harder to control. Treatment can also lower infection-fighting cells, so the same symptom has different possible explanations depending on where you are in diagnosis or treatment.

A fever alone does not identify its cause. A clinician may consider accompanying symptoms, medicines, recent treatment and blood test results when deciding whether infection, the leukaemia or another problem is responsible.

If you have acute myeloid leukaemia or are receiving treatment, follow the fever instructions given by your haematology team. Check your temperature with a thermometer, note when it began, and record chills, cough, urinary symptoms, rash or pain. Contact the treatment team promptly rather than waiting for the fever to settle on its own.

Do not take medicine to hide a fever before speaking with the team unless they have already told you to do so. The team may need an accurate temperature and may arrange blood tests, cultures or treatment for a possible infection.

Treat fever during chemotherapy or during a period of low white blood cells as urgent. Use the emergency contact route supplied by your cancer team. Seek immediate help for fever with shaking chills, confusion, breathing difficulty, faintness, severe weakness or rapidly worsening illness. Do not drive yourself if you feel faint or confused.

Ask which temperature should trigger a call for your individual treatment plan, which number to use outside clinic hours, whether your latest blood count changes the urgency, and which fever medicines you should avoid before assessment.