Thalassaemia: symptoms, testing and care

Thalassaemia is an inherited blood condition in which the body makes haemoglobin differently, sometimes leading to anaemia.

Haemoglobin carries oxygen in red blood cells. The effects vary widely: some people carry a gene change without needing treatment, while others have more significant anaemia and need regular specialist care. It is passed through families and is not caused by diet or by anything a person has done.

Fatigue and pale skin are common presentations of thalassaemia when anaemia is present. A person may also notice reduced exercise tolerance, breathlessness on exertion, dizziness, or a fast heartbeat. People with a trait often have no symptoms at all.

Symptoms can develop gradually. A new marked change in energy, shortness of breath at rest, fainting, chest pain, or severe weakness needs prompt medical assessment.

Genes inherited from one or both parents affect how haemoglobin chains are made. The pattern of genes influences whether someone has a trait or a more severe form. A carrier can feel well yet still pass the gene change to a child.

The course depends on the type of thalassaemia. Mild forms may be discovered only on a routine blood count. More severe forms can cause ongoing anaemia and may affect growth, bone health, or organs if not monitored. Care plans are adjusted to symptoms, blood results, and any treatments received.

Anyone can inherit thalassaemia. It is more likely to be considered when relatives have thalassaemia or unexplained small red blood cells, or when both prospective parents may be carriers. Knowing family history before pregnancy can help families discuss testing choices.

A clinician starts with symptoms, family background, and a blood count. Further blood testing can look at haemoglobin types and help distinguish thalassaemia from other causes of anaemia. Genetic testing may be offered to clarify an inherited pattern or support family planning.

Do not start iron supplements solely because red blood cells are small. Iron deficiency and thalassaemia can overlap, and a clinician can check iron stores before advising treatment.

A thalassaemia trait commonly needs explanation and follow-up rather than active treatment. For more severe forms, a specialist may use transfusions, medicines that help manage iron, and monitoring for treatment effects. The right approach is individual and can change over time.

Keep a record of your diagnosis and blood results, especially when seeing a new clinician. A balanced diet, planned activity within your energy level, and attending scheduled reviews support day-to-day health. Tell the clinical team about pregnancy plans, because partner testing and counselling may be relevant.

Significant ongoing anaemia can strain the heart and limit activity. Repeated transfusions can lead to iron building up in the body, which is why specialist monitoring is important. Symptoms such as increasing breathlessness, palpitations, or abdominal swelling should be assessed rather than managed alone.

Thalassaemia cannot be prevented after the genes are inherited. Carrier testing before pregnancy or marriage can clarify whether a couple could pass a more severe form to a child. A healthcare professional can explain what each result means for the family.

A GP or haematology team can assess suspected thalassaemia, persistent anaemia, or a family history of the condition. Seek urgent care for severe breathlessness, fainting, chest pain, or sudden worsening weakness.