Answer by
SarahJane (114)
When your enamel is wearing away your teeth will turn greyish. Enamel also protects the teeth from feeling sensitive, so it is the same answer for both problems. Some possible causes for that are, too much caffeine, too abrasive of a toothbrush and also teeth whiteners can cause that as well. Flouride toothpaste and mouthwash will help.