What is one of the causes of hypoglycemia?

Nausea and vomiting can lead to hypoglycemia because they may prevent a person from consuming the necessary carbohydrates that maintain stable blood glucose levels. When someone experiences nausea or vomiting, they might not be able to eat or may involuntarily lose their food intake, resulting in a decrease in blood sugar levels.

While excessive exercise is also a potential contributor to hypoglycemia, particularly because it can increase glucose utilization and deplete glycogen stores, the context of this question indicates that the most direct link here is through the inability to maintain proper nutrition due to gastrointestinal distress caused by nausea and vomiting.

In contrast, high food intake usually leads to increased blood glucose levels, and consuming high sugar foods, while might seem counterintuitive, typically causes a spike in blood sugar rather than a decrease unless there's an overwhelming insulin response in a diabetic individual. Thus, nausea and vomiting's direct impact on food intake makes it a plausible cause of hypoglycemia.