I've had it since I was a child. Am 40 now. I get hypoglycemic episodes (confirmed many times with a glucose prick test - symptoms are loss of mental focus, cold sweats, shaky hands, overall fatigue and lethargy, voracity to eat), solved easily by eating carbs / sugar. No doctor has been able to provide an explanation or even cared that I brought it up. it is not consistent either, I can be eating the same things in same schedules, some days I get it some days I don't. When I tend to get it though, it is in clusters. Like I get it frequently for a couple months, then nothing a couple months. Sometimes it goes away for a year. Then comes back. Most frequently I get it a couple hours after eating fruit on a semi / empty stomach.