What does generalised weakness feel like with anaemia?

You may feel drained after ordinary tasks, such as walking, bathing or carrying groceries. Muscles can seem heavy, and activity may leave you unusually breathless or aware of your heartbeat. Some people also notice dizziness, headaches, paler skin, or difficulty concentrating. The experience can build gradually, so it may be mistaken for poor sleep or stress.

Anaemia has different causes, including blood loss, reduced red blood cell production, or increased breakdown of red blood cells. Weakness alone cannot identify the cause, and a blood test is usually needed to check the blood count and guide further assessment.

Arrange a medical assessment if weakness persists, affects daily activities, or returns repeatedly. Mention breathlessness, palpitations, dizziness, dietary changes, heavy menstrual bleeding, black stools, or any other bleeding. Keep a note of when symptoms started and what makes them worse. Do not begin iron supplements without advice, because treatment depends on the type and cause of anaemia.

Seek urgent medical help for severe breathlessness at rest, chest pain, fainting, confusion, a racing heartbeat that does not settle, or visible heavy bleeding. Black or bloody stools with marked weakness also need prompt assessment. These signs can indicate that oxygen delivery or blood volume is seriously affected.

Ask what type of anaemia is being considered, which blood tests are needed, and whether bleeding or another condition should be investigated. You can also ask how to pace activity safely while the cause is being assessed.