Hunger is thefeeling of wanting toeat.Ghrelin is ahormone that makes people feel hungry. The opposite of hunger is calledsatiety orfullness.Leptin causes this feeling. People cansurvive weeks without eating,[1] but they will start to feel hungry after they have not eaten for a few hours. Hunger is generally considered quite uncomfortable. People who have eatenfood usually will feel less hungry, or not hungry at all. People can live longer without food than withoutwater.
Hunger is also used to refer to people who generally have little to eat, and are therefore often hungry. This can lead tostarvation.