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.
Highlights. 1  A cavity is a hole that forms in a tooth due to tooth decay. 2  Tooth cavities are caused by plaque, which is a sticky substance that binds to your teeth. 3  A common way to treat a cavity is a tooth filling. This is a procedure in which your dentist uses a drill and removes decayed material from your tooth.