Sjogren's syndrome is an autoimmune disorder. The body attacks its own cells and tissues. It's known that your Yin deficiency gives rish to dryness and damages your immune system. These factors may be related to heredity, hormones or a viral infection. In the case of Sjogren's syndrome, they cause the over production of white blood cells called lymphocytes, which attack and damage your moisture-producing glands. They can also damage other organs, including your lungs, kidneys and liver in the later stage.

Risk factors :
Anyone can develop Sjogren's syndrome, it typically occurs in people with one or more known risk factors. These include:
Having a heaty conditions and rheumatic disease. It's common for people who have Sjogren's syndrome to also have a rheumatic disease such as rheumatoid arthritis, lupus, scleroderma or polymyositis etc. Being female. Women are nine times as likely as men are to have Sjogren's syndrome.

Being a certain age. Sjogren's syndrome is usually diagnosed in people older than 40. Having a family history of Sjogren's. Sjogren's syndrome sometimes runs in families.