Hunger can be defined as starvation a physiological drive to find and eat food a sensation caused by distension of the stomach and small intestine a psychological desire to eat

Hunger is a physiological drive to find and eat food.

Hunger is influenced by hormones, there are two major hormones that tip the balance between hunger and fullness; these are leptin and ghrelin. Leptin is released from the body's long term fat stores, and suppresses hunger while gherlin causes the stomach rumblings as a physical reminder to eat, which brings the drive to want to find and eat food.