If you are having an “ouch” experience when one or more of your teeth react to heat or cold, you should see your dentist. Tooth sensitivity can be triggered by hot, cold, sweet or sour food or drink, but it also indicates the tooth is losing its protective coating. Brushing too hard, gum recession, cracked teeth or old fillings are all possible culprits. As well as seeing your dentist, you can use a soft bristled brush, toothpaste for sensitive teeth and watch what you eat. As always, good oral hygiene is a must.