Is it normal to have this buzzing feeling?

This is going to sound really weird and I really don't know how to explain it...but I've noticed that every once in a while when I'm hungry or when my stomach feels really "empty" in a way, I get this strange buzzing/tingling feeling in the back of my neck. Most of the time it seems to occur when I wake up hungry. I can't really explain it any better...the buzzing seems to come from the area where the spinal cord and skull meet...and it's like I can hear the noise. It's not painful and it doesn't affect any of my normal functions. Has anyone else experienced this?