Sjogren's syndrome is an autoimmune disease characterized by dryness of the mouth and eyes. Autoimmune diseases feature the abnormal production of extra antibodies in the blood that are directed against various tissues of the body. This particular autoimmune illness features inflammation in glands of the body that are responsible for producing tears and saliva. Inflammation of the glands that produce tears (lacrimal glands) leads to decreased water production for tears and dry eyes. Inflammation of the glands that produce the saliva in the mouth (salivary glands, including the parotid glands) leads to dry mouth and dry lips.

Sjogren's syndrome with gland inflammation (resulting dry eyes and mouth, etc.) that is not associated with another connective tissue disease is referred to as primary Sjogren's syndrome. Sjogren's syndrome that is also associated with a connective tissue disease, such as rheumatoid arthritis, systemic lupus erythematosus, or scleroderma, is referred to as secondary Sjogren's syndrome.


What causes Sjogren's syndrome?


While the exact cause of Sjogren's syndrome is not known, there is growing scientific support for genetic (inherited) factors. The genetic background of Sjogren's syndrome patients is an active area of research. The illness is sometimes found in other family members. It is also found more commonly in families that have members with other autoimmune illnesses, such as systemic lupus erythematosus, autoimmune thyroid disease, type I diabetes, etc. About 90% of patients with Sjogren's syndrome are female.


What are the symptoms of Sjogren's syndrome?

Symptoms of Sjogren's syndrome can involve the glands, as above, but there are also possible affects of the illness involving other organs of the body (extraglandular manifestations). When the tear gland (lacrimal gland) is inflamed from Sjogren's, the resulting eye dryness can progressively lead to eye irritation, decreased tear production, "gritty" sensation, infection, and serious abrasion of the dome of the eye (cornea). Dry eyes can lead to infections of the eyes. Inflammation of the salivary glands can lead to mouth dryness, swallowing difficulties, dental decay, gum disease, mouth sores and swelling, stones and/or infection of parotid gland inside of the cheeks. Dry lips often accompany the mouth dryness. Other glands that can become inflamed, though less commonly, in Sjogren's syndrome include those of the lining of the breathing passages (leading to lung infections) and vagina (sometimes noted as pain during intercourse recurrent vaginal infections). Extraglandular (outside of the glands) problems in Sjogren's syndrome include joint pain or inflammation (arthritis), Raynaud's phenomenon, lung inflammation, lymph-node enlargement, kidney, nerve, and muscle disease. A rare serious complication of Sjogren's syndrome is inflammation of the blood vessels (vasculitis), which can damage the tissues of the body that are supplied by these vessels.