Tooth sensitivity

Tooth sensitivity can affect one or more teeth. It’s most common when you eat or drink something hot, cold, sweet, or sour. Sometimes a breath of cold air can set it off. The pain can be sharp and sudden and can shoot deep into the nerve endings of your teeth.
Steps to Reduce Tooth Sensitivity
The good news is there are many ways to control sensitive teeth. You can:

Brush and floss regularly. Use proper brushing and flossing techniques to thoroughly clean all parts of your teeth and mouth.
Use a soft-bristled toothbrush. Brush gently and carefully around the gum line so you don’t remove gum tissue.
Use a toothpaste for sensitive teeth. Several brands are available. Regular use should make teeth less sensitive. You may need to try several brands to find the product that works best for you. Another tip: Spread a thin layer on the exposed tooth roots with your finger or a Q-tip before you go to bed. Use a fluoridated toothpaste, not a tartar control one.
Watch what you eat. Avoid lots of highly acidic foods and drinks.
Use fluoridated dental products. Using a fluoridated mouth rinse daily can decrease sensitivity. Ask your dentist about products available for home use.
Don’t grind your teeth. Use a mouth guard at night.
See your dentist every 6 months (or sooner, depending on your condition).
If you still have discomfort, talk to your dentist. There may be a procedure that can help. He might recommend:

White fillings(bonding) to cover exposed root surfaces
Fluoride varnishes applied to the exposed root surface
Dentin sealers applied to the exposed root surface