Momentary sensitivity to hot or cold foods
Possible Problem
If the discomfort lasts only moments, sensitivity to hot and cold foods generally does not signal a problem. The sensitivity may be caused by a loose filling or by minimal gum recession which exposes small areas of the root surface.
What To Do
Try using toothpastes made for sensitive teeth. Brush up and down with a soft brush; brushing sideways wears away exposed root surfaces. If this is unsuccessful, see your dentist.
Sensitivity to hot or cold foods after dental treatment
Possible Problem
Dental work may inflame the pulp, inside the tooth, causing temporary sensitivity.
What To Do
Wait four to six weeks. If the pain persists or worsens, see your dentist.
Sharp pain when biting down on food
Possible Problem
There are several possible causes of this type of pain: decay, a loose filling or crack in the tooth. There may also be damage to the pulp tissue inside the tooth.
What To Do
See a dentist for evaluation. If the problem is pulp tissue damage, your dentist may send you to an endodontist. Endodontists are dentists who specialize in pulp-related procedures. Your endodontist will perform a procedure that cleans out the damaged pulp and fills and seals the remaining space. This procedure is commonly called a root canal.
Lingering pain, typically lasting more than 30 seconds, after eating hot or cold foods
Possible Problem
This probably means the pulp has been irreversibly damaged by deep decay or physical trauma.
What To Do
Constant and severe pain and pressure, swelling of gum and sensitivity to touch
Possible Problem
A tooth may have become abscessed, causing an infection in the surrounding tissue and bone.
What To Do
Dull ache and pressure in upper teeth and jaw
Possible Problem
Grinding of teeth, a condition known as bruxism, can cause this type of ache. The pain of a sinus headache may also be felt in the face and teeth.