When to worry about generalised weakness with iron deficiency anaemia

Iron is needed to make haemoglobin, which carries oxygen in red blood cells. With iron deficiency anaemia, tissues may receive less oxygen during activity, leading to fatigue, reduced stamina, dizziness, headaches, pale skin, or a racing heartbeat. The source of iron loss or low intake also needs attention, including heavy menstrual bleeding or digestive blood loss.

Arrange a medical review for persistent or unexplained weakness. Your clinician may discuss blood tests, diet, bleeding history, and an iron replacement plan. Take prescribed iron as directed and mention stomach symptoms, constipation, dark stools, pregnancy, or other medicines. Do not rely on supplements alone when the cause of deficiency has not been assessed.

Get emergency help for chest pain, severe breathlessness at rest, fainting, new confusion, a very fast or irregular heartbeat with weakness, vomiting blood, or black tarry stools. Seek same-day advice for ongoing bleeding, rapidly worsening symptoms, marked dizziness, or weakness that makes standing or walking unsafe.

Ask which tests can confirm iron deficiency, where blood loss might be coming from, how to take treatment safely, when improvement should be reviewed, and what symptoms mean you should return sooner.