How long can a human live without water How long can human live without food? A human can't live without food for 3 or 4 days (however your body type is,) and a human can't live without water for 2 or 3 days.
Cavities refer to tooth decay, which occurs when specific types of bacteria produce acid that destroys the toothâs enamel and its underlying layer, the dentin. Signs & Symptoms. Cavity symptoms include: 1  Toothache. 2  Sensitivity to sweet, hot or cold foods or drinks.
A cavity is the result of bacteria in the mouth, and its reaction to sugars and starches. As bacteria break down the sugars and starches, sticky plaque filled with acids form over the tooth. If left unchecked, plaque can form tartar, which cannot easily be brushed away.