INS and Hypoglycemia: When hypoglycemia (plasma glucose concentration: 1.89 ± 0.59 mmol/L (normal range: 3.4–6.1 mmol/L)) attacked in fasting time or 72 h fasting glucose test, plasma insulin concentration ((39.59 ± 30.14) mU/L, normal range: (2.6–24.9 mU/L)) and insulin-releasing index ((1.23 ± 1.05) mIU/L/(mg/dL), normal range: <0.3 (mIU/L)/(mg/dL)) were much higher.