July 23rd is World Sjögren's Day. It’s named after Dr. Henrik Sjögren (pronounced SHOW-grin), the Swedish ophthalmologist who noticed a connection between patients he was seeing with dry eyes, and patients who suffered from a consistently dry mouth. Further investigation resulted in the discovery that these symptoms where caused by an immune system attack on these patients' moisture-producing glands. Today, approximately 4 million Americans live with this chronic disease, and many more go undiagnosed. Let’s take a quick look at the symptoms, and learn more about this disease that causes more than just the occasional parched mouth.