Each tooth is connected to an organ in the body: tooth pain can be an indicator of future problems.

Some common ailments and their dental manifestations:
Pain in the incisors may indicate chronic pyelonephritis, a urinary tract infection, or otitis media.
Persistent pain in the first incisor may be related to hepatitis or cholecystitis.
Pain in the premolars, especially the lower ones, may indicate asthma or chronic lung problems.
Upper molars may be painful due to gastritis, duodenal ulcers, or anemia.
Pain in the lower molars may be related to arteriosclerosis, colitis, or joint inflammation.
Pain in the wisdom tooth may indicate heart or bowel problems.