Experienced fasting supervisors have said that true hunger is felt mostly in the throat and mouth.....and not in the stomach.
"Genuine hunger, too, is felt in the mouth and throat. In real hunger there is a distinct and conscious desire for food. The condition is one of comfort, not of discomfort and suffering. There is a "watering" of the mouth (flow of saliva) and often a distinct desire for a particular food. Hunger is a localized sensation and is not in the stomach. The healthy person is not conscious of any sensations in or about the stomach when hungry."
Dr H M Shelton Vol III Hygienic System (Fasting & Sunbathing)