The exact cause of the autoimmune diseases remains unknown, but it is known that genetic predisposition plays a big role in the autoimmune system. Some autoimmune diseases run in families, so it is possible to find multiple members of a family with an autoimmune disease. Autoimmune disease occurs as a combination of several genes.
It can also be triggered by infections, environmental factors, use of certain drugs, stress, and hormonal imbalance. So if you have a family history of autoimmune disease, there is a possible risk that you might have one. If you have flares of symptoms, or you fall sick often, and you know of someone in your family with a similar condition, you should visit your doctors for further assistance.