Dry Mouth and Excessive Thirst

Good. That makes Sjogren's syndrome less likely. Sjogren's syndrome is a rheumatic disease that affects the entire body. In addition to causing dry eyes and mouth, it commonly causes arthritis, rash, fever, and other symptoms.

Now, on to some questions about some other possible causes of a dry mouth.

Have you had a significant injury to your head or neck? Have you ever had radiation therapy to your head or neck?

Yes, I've had an injury or radiation.

Nope, no injury and no radiation.