Why does hunger come and go in “waves”, even if you don’t eat anything?

Question

For example if you’re intermittent fasting or water fasting, and the hunger comes and goes in waves as opposed to just getting hungrier and hungrier by each passing hour. How come? I do intermittent fasting and my periods of hunger are brief. You’d think the longer I go without eating, the worse my hunger would get but instead, I just get these brief periods of hunger and they eventually disappear, as if I had already eaten.

In:

Answer 1

Exact same thing with me, I don’t eat until 3pm and stop at 9pm. I don’t get hungry until about 10 for only about an hour and then I feel fine