Do you suffer from frequent canker sores? Do you always seem to have dry mouth? These could be caused by many things that are no cause for alarm, but they could also be warning signs of a bigger problem: celiac disease. Celiac disease has several of what are known as "oral manifestations" – physical symptoms that occur in the mouth that may indicate the presence of celiac disease in the body. If you are experiencing any one or more of these indicators, you may have the condition.