Are Autoimmune Diseases Hereditary? Let’s Know From a Doctor

Autoimmune diseases affect millions of people around the world and can have a major impact on daily life. A common concern for people living with these conditions is whether they can pass them on to their children. Many people with lupus, rheumatoid arthritis, or other autoimmune disorders often ask, "Will my children get this too?"

According to Dr Tushar Tayal, Associate Director - Internal Medicine at CK Birla Hospital, Gurugram, the answer is not a simple yes or no. Genetics do play a role, but they are only one part of the picture. Autoimmune diseases usually develop because of a combination of inherited genes and environmental factors.

Do Autoimmune Diseases Run in Families?

According to a study published in the Journal of Translational Autoimmunity, family history can increase the likelihood of developing an autoimmune disease, but this does not mean the disease will definitely be inherited.

Dr Tayal explains that what often runs in families is not the disease itself but a tendency to develop autoimmune conditions. Certain inherited genes make the immune system more likely to react in abnormal ways. However, these genes alone are usually not enough to cause illness.
This means that having a parent or sibling with an autoimmune disease raises the risk slightly, but many people with a family history never develop one themselves.

The Role of Genes

Research published in the journal Human Immunology has shown that several genes are linked to autoimmune diseases. Among the most important are the Human Leukocyte Antigen (HLA) genes. These genes help the immune system recognise the difference between the body's own tissues and harmful invaders.

Changes in these genes can increase the chances of the immune system attacking healthy cells. However, carrying these genes does not guarantee that someone will develop an autoimmune disease.

Dr Tayal says that these genes simply make the door a little more open. They create a higher level of susceptibility rather than certainty.

Many people carry these genetic changes throughout their lives without ever becoming ill.

Why Family Members May Have Different Autoimmune Diseases

A common misunderstanding is that a parent with an autoimmune disease will pass exactly the same condition to their child. In reality, this is uncommon.

Because many autoimmune diseases share similar genetic roots, different family members may develop different conditions. For example, a mother with rheumatoid arthritis may have a daughter who later develops coeliac disease or Hashimoto's thyroiditis instead. Another family member may never develop any autoimmune disease at all.

This happens because the inherited genes increase the overall risk of immune system problems rather than causing one specific disease.

The exact condition that develops depends on many other factors beyond genetics.

Also Read: Can You Have More Than One Autoimmune Disease?

Environmental Factors Also Matter

Genes alone rarely explain why autoimmune diseases develop. Environmental factors play an equally important role in triggering illness in people who are already genetically vulnerable.
According to Dr Tayal, several factors have been linked to autoimmune diseases, including:

• Certain viral or bacterial infections
• Long-term physical or emotional stress
• Smoking
• Hormonal changes
• Low vitamin D levels
• An unhealthy gut microbiome

These factors may influence how the immune system behaves and can trigger disease in someone who already has a genetic tendency.

One of the strongest examples comes from studies of identical twins. Since identical twins share almost all of their genetic material, both would be expected to develop the same disease if genes were the only cause. However, this is often not the case. One twin may develop an autoimmune disease while the other remains completely healthy, according to a report published by the Americal College of Rheumatology.

Should Families Be Concerned?

Having a family history of autoimmune disease should encourage awareness rather than fear.
Most children of parents with autoimmune diseases will never develop the same condition. Even when the risk is slightly higher than average, it remains far from certain.

Instead of worrying, families should pay attention to early warning signs. Persistent tiredness, joint pain or stiffness, skin rashes, digestive problems, unexplained weight changes and ongoing inflammation should not be ignored.

Early medical assessment can lead to quicker diagnosis and treatment, helping to prevent complications and improve long-term health.

Is Genetic Testing Necessary?

Many people wonder whether genetic testing can predict autoimmune diseases.

Dr Tayal says that routine genetic testing is generally not recommended for most families. While certain genes are associated with autoimmune diseases, having these genes does not accurately predict who will become ill.

Doctors may consider genetic testing only when there is a strong family history involving several relatives or when there is a specific medical reason to investigate further.

For most people, regular health check-ups and paying attention to symptoms are far more useful than genetic screening.

Can the Risk of Genetic Autoimmune Disease Be Reduced?

Although genetics cannot be changed, maintaining a healthy lifestyle may help lower the risk of triggering autoimmune diseases or reduce the severity of symptoms.

Simple steps include eating a balanced diet, exercising regularly, avoiding smoking, managing stress, getting enough sleep and maintaining healthy vitamin D levels where appropriate. Prompt treatment of infections and regular medical care also support overall immune health.
While these measures cannot completely prevent autoimmune diseases, they contribute to better long-term wellbeing.

Final Word

Autoimmune diseases can run in families, but they are not inherited in the same predictable way as traits such as eye colour or height. Genetics increase a person's susceptibility, but environmental factors usually determine whether the disease develops. Understanding the early symptoms, seeking medical advice when needed and maintaining a healthy lifestyle remain the most practical ways to manage the risk.