Reactive hypoglycemia is a common condition, especially in people with other glucose-related issues such as PCOS. How little or how much you experience it varies widely. In people with diabetes, the swings of reactive hypoglycemia tend to be more pronounced—and their glucose level can get so low that it causes a coma. In nondiabetics, just a small dip can lead to extreme hunger, even if a meal was only two hours ago. And the greater the dip, the more hungry we become before the next meal.