How does sjogrens syndrome happens?

Autoimmune disease: Sjogrens is an autoimmune disease. This means that the body starts to " attack" itself due to an alteration in the ability to identify its own tissue. It " perceives" the target tissue as a foreign invader and tries to eliminate it. This leads to signs and symptoms of whatever organ is being attacked. Like many autoimmune diseases, there are genetic factors that predispose someone to be affected.