If you have sensitive teeth, you may experience pain or discomfort after consuming cold or hot foods or beverages. Dentin hypersensitivity is another term for tooth sensitivity. It might happen momentarily after a root canal or a filling. It can also be caused by gum disease. The condition can also be triggered by certain medications such as phenothiazines used to treat mental disorders. Sensitive teeth can be caused by any of the following: • Dentin hypersensitivity (DH) is the most common cause of painful teeth. When exposed dentin is irritated by cold drinks or snacks high in acid content, it will trigger pain signals to go up to the brain. People who suffer from DH may be able to relieve some of their pain by avoiding products that contain acids. Although protective agents are available to limit the effect of acids on dentin, they cannot mask the pain signal when it reaches the brain. • Aging is the main cause of tooth sensitivity. As we get older, our saliva production decreases, which leads to more frequent mouthwashings and less-frequent brushings. This can also lead to tooth decay if people aren't careful about brushing and flossing regularly. • Stress can also contribute to tooth sensitivity. If you're under a lot of stress at work or at home, it can affect your dental health.