Sensitive teeth can have many causes. If hot or cold foods bother your teeth, or perhaps acidic drinks like wine or soda do, you might have a greater problem in store down the road. Some issues could be simple, like initial decay or the beginnings of gum disease, but others could be far more dangerous, like fractured teeth or an exposed root.
When the hard, outer layer of enamel on teeth wears away or disappears completely, the dentin underneath becomes exposed. Blood vessels and nerves exist inside this part of the tooth, and when certain foods or liquids come in contact, it can cause anything from minor aching to severe pain.
If you experience these symptoms, you will want to talk to a trained professional. Your dentist or dental hygienist can check and see what may be causing your pain. Remember, if your teeth are sensitive, they are trying to tell you something.