When to worry about persistent fatigue with anaemia in cancer

Anaemia means the blood may carry less oxygen to tissues. This can leave you drained, short of breath with activity, light-headed, pale, or aware of a faster heartbeat. Cancer itself, bleeding, inflammation, nutrition, kidney problems, and treatment can all be relevant, so a blood test helps guide the assessment.

Tell your team how fatigue changes walking, washing, work, concentration, and sleep. Record dizziness, breathlessness, palpitations, bleeding, dark stools, or reduced appetite. Pace activities, rest between tasks, drink fluids if allowed, and avoid taking iron or other supplements unless your clinician confirms they are appropriate.

Call your oncology service promptly if fatigue is rapidly worsening or comes with breathlessness at rest, chest pain, fainting, a racing heartbeat that does not settle, or signs of bleeding. Seek emergency help for severe breathing difficulty, collapse, confusion, or heavy bleeding. Do not wait for a routine appointment when these symptoms appear.

Could anaemia, bleeding, treatment, or another condition be contributing? When should my blood count be checked? Would treatment for the cause help, and which activities are safe while I feel weak?