Why do our teeth become sensitive (敏感的)? When you drink cold water, your teeth may have a(n) ___1___ feeling. If you’ve ever experienced this feeling, you may have sensitive ___2___. Actually, millions of people around the world ___3___ this common problem.
People with sensitive teeth may have feelings of pain when they ___4___ or drink something cold, hot, sour or sweet. Sometimes even a deep ___5___ of cold air can make you experience pain.
Scientists have found that some reasons can ___6___ you to have sensitive teeth. ___7___, brushing your teeth too hard can hurt the enamel (牙釉质) on your teeth. Foods that are acidic (酸性的), such as lemons and tomatoes, can also ___8___ enamel over time.
There are a number of ways to help to reduce the pain ___9___ your teeth are sensitive. It will be helpful to use a soft toothbrush and to brush your teeth carefully and ___10___. Watching what you eat and drink can help, too.