The first signs you have that there is a problem will probably come from being extra sensitive to foods that are particularly spicy, sour, or acidic. In time, actual sores
may develop, similar to cold sores
, and it may be painful to brush your teeth or to use mouthwash (consult with your dentist about non-alcoholic mouthwashes). In my case, I first noticed a problem when the gums around my left molars started to hurt when I brushed my teeth.