Development of iron deficiency anaemia symptoms depend on how quickly the anaemia develops. In chronic, slow blood loss, patients often tolerate extremely low haemoglobin concentrations and may have very few symptoms (1).
Most patients complain of tiredness, breathlessness after exertion (2).
Other less common symptoms include:
Additionally, iron deficiency may be associated with the following signs:
Symptoms such as angina, marked ankle oedema, or dyspnoea at rest is not typically seen (in haemoglobin concentrations of more than 7 g/dL) unless there is additional cardiorespiratory pathology (2).
Reference:
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