Alpha thalassemia

Overview

Alpha thalassemia is a genetic blood condition that affects how your body makes hemoglobin, the protein in red blood cells that carries oxygen. People with this condition have less hemoglobin and fewer red blood cells than usual, which can lead to mild or severe anemia (a shortage of healthy red blood cells).

Alpha thalassemia is one of the most common inherited blood disorders worldwide. It is especially common in people of African, Mediterranean, Middle Eastern, and Southeast Asian descent. In the UK, it is less common but still occurs, particularly in certain communities.

It affects males and females equally. The condition often runs in families, and the most severe form can affect unborn babies during pregnancy. Many people who carry the trait have no symptoms and may not know they have it.

Symptoms

Common symptoms

• Tiredness or fatigue
• Weakness
• Pale skin
• Shortness of breath, especially with activity
• Dizziness or light-headedness

Symptoms in children

• Slow growth and delayed puberty
• Pale skin and low energy
• Jaundice (yellowing of the skin and eyes) in severe cases
• An enlarged spleen, which may cause a swollen belly

Symptoms in older adults

• Increased fatigue and shortness of breath on exertion
• Worsening anemia due to other health conditions
• Gallstones or iron overload, which can cause joint pain or organ problems

Causes

Main causes

• Alpha thalassemia is caused by changes (mutations) in the genes that help make alpha-globin.
• You have four alpha-globin genes, two from each parent. The more missing or damaged genes, the more severe the condition.
• If one gene is affected, you are a silent carrier with no symptoms. If two are affected, you have mild anemia. If three are affected, you have moderate to severe anemia. If all four are affected, it is usually fatal before birth unless treated in the womb.

Risk factors

• Having a family history of alpha thalassemia
• Being of African, Southeast Asian, Mediterranean, Middle Eastern, or Indian descent
• Having a parent who carries the alpha thalassemia trait

When to see a doctor

See a doctor urgently if:

• If you or your child have symptoms like unexplained tiredness, pale skin, or a swollen belly, see a doctor promptly.
• Seek urgent care if your baby is very sleepy, not feeding well, or has yellowing skin or eyes.

Book a routine appointment if:

• If you have persistent fatigue, weakness, or other symptoms of anemia, make a routine appointment with your GP.
• If you are pregnant or planning a pregnancy and have a family history of thalassemia, talk to your doctor.
• If you know you carry the trait and want to understand what it means for your family, ask for genetic counselling.

Diagnosis

Alpha thalassemia is usually found through blood tests. Your doctor will ask about your symptoms, family history, and ethnic background. If blood tests suggest thalassemia, a special test can confirm the type and severity.

Tests that may be done

• Complete blood count (CBC) to check hemoglobin levels and red blood cell size and number
• Hemoglobin electrophoresis to look at the types of hemoglobin in your blood
• Genetic testing to check for changes in the alpha-globin genes
• Iron studies to rule out iron deficiency anemia

What to expect at your appointment

Your doctor will take a detailed medical and family history. You will have a blood sample taken, and possibly a genetic test. If you are pregnant and there is a risk, tests during pregnancy can check whether your baby is affected. Results may take a few weeks, and you will be given time to talk through them.

Treatment

Treatment for alpha thalassemia depends on how many genes are affected and how severe the anemia is. Many people need no treatment at all, while others may need regular medical care to manage symptoms and prevent complications.

Self-care at home

• Eat a well-balanced diet with plenty of iron-rich foods and vitamin C to help absorption, but follow your doctor's advice, as too much iron can be harmful.
• Take any supplements your doctor recommends, such as folic acid, to support red blood cell production.
• Get enough rest and pace your activities to manage fatigue.
• Practice good hygiene and keep up to date with vaccines to avoid infections that could make anemia worse.

Medical treatments

Medical care may include regular blood transfusions for severe anemia, medicines to remove extra iron from the body (chelation therapy), and routine monitoring of blood counts. For people with moderate or severe forms, a specialist doctor (haematologist) will guide treatment. Always discuss your options with your healthcare provider.

When is surgery considered?

In rare cases, surgery to remove the spleen (splenectomy) may be considered if an enlarged spleen causes significant pain, ruptures, or destroys too many red blood cells. This is only done after a careful evaluation by a specialist.

Living with this condition

Living with alpha thalassemia means learning to manage your energy levels and working closely with your healthcare team. Attend regular check-ups and tell your doctor about any new or worsening symptoms.

Lifestyle tips

• Stay active with gentle activities like walking or swimming, but rest when you need to.
• Drink plenty of fluids to stay well hydrated.
• Limit alcohol and avoid smoking.
• Keep vaccinations up to date to protect against infections.

Diet and exercise

A balanced diet supports your overall health. If you have iron overload, your doctor may advise limiting iron-rich foods. Exercise helps maintain strength and mood, but listen to your body and rest when you feel tired.

Mental health and emotional wellbeing

Dealing with a chronic condition can be stressful and may sometimes cause anxiety or low mood. These feelings are normal, and it is important to talk about them. Your doctor can offer support, and talking to a counsellor or psychologist may help.

Prevention

Alpha thalassemia cannot be prevented because it is inherited through genes. However, if you have a family history, genetic counselling before pregnancy can help you understand your risk of passing it on. Prenatal testing is available if you become pregnant and want to know whether your baby is affected.

Vaccines

Staying up to date with recommended vaccines, like flu and COVID-19, is important to avoid infections that could make anemia worse. Ask your healthcare provider whether you also need vaccines such as hepatitis B, especially before any medical treatment.

Screening programmes

Newborn screening for thalassemia is not standard everywhere, but a simple blood test can detect it. If you are planning a family, a blood test can show whether you carry the trait.

Complications

If left untreated

• Severe anemia may lead to poor growth, heart problems, or bone changes.
• Iron overload from repeated transfusions can damage organs such as the heart and liver if not managed.
• An enlarged spleen can cause pain and, rarely, rupture.

Long-term outlook

With proper care and monitoring, most people with alpha thalassemia live full and active lives. Even those with more severe forms can be helped by modern treatments. Your healthcare team will be there to support you every step of the way.

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