Any kind of tooth pain indicates that you might have damagedtooth. Some of the most common reasons for tooth pain are tooth decay, cavities, and infections in the tooth or gums. A toothache brings with it a continuous dull ache, increased pain on eating something sweet, severe pain on biting, continuous tingling sensation (known as sensitivity), tenderness in the mouth, swelling of gums, bad smell from the mouth, an ache in the jaws, bad taste in the mouth and even fever ... Read more