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.
Tooth decay is a process by which the tooth breaks down. There are a number of reasons for tooth decay including a poor diet high in sugars and acid, inadequate personal oral hygiene, genetics, and other factors.ooth decay, often referred to as a cavity is formed when bacteria that normally exist in your mouth use carbohydrate-containing foods (cookies, candy, sweetened cereal, fruit, soda, etc.) to produce acid.