Hypoglycemia is paroxysmal, the time and frequency vary with the etiology, and the symptoms are ever-changing. Clinical manifestations can be summarized as the following two aspects.

1. Manifestations of autonomic (sympathetic) nerve overexcitation

During hypoglycemia attack, due to the release of adrenaline and norepinephrine from sympathetic nerve and adrenal medulla, the clinical manifestations are sweating, hunger, palpitation, trembling and pallor.

2. manifestations of brain dysfunction

are a series of manifestations of brain dysfunction when the brain lacks adequate glucose supply. The initial manifestations are mental symptoms such as inattention, slow thinking and language, dizziness, lethargy, restlessness, irritability, strange behavior, etc. In severe cases, convulsions, coma and even death occur.

Extended information:

Symptoms and signs of functional hypoglycemia:

Hypoglycemia mainly occurs 2-4 hours after breakfast. Patients with adrenocortical hypersecretion syndrome feel palpitation, palpitation, sweating, pallor, hunger, weakness, tremor of hands and feet, high blood pressure and so on. Generally, there is no coma or convulsion, occasionally fainting, and it is rare after lunch and dinner.

each attack lasts about 15~2min, and it can be relieved by itself. The condition does not develop progressively, and the fasting blood sugar is normal. The blood sugar can be normal or as low as 2.8mmol/L(5mg/dl) at the time of attack, but it will not be lower. The plasma insulin level and insulin release index are in the normal range. Oral glucose tolerance test shows that the blood sugar can drop to a low value 2 ~ 4 hours after taking sugar, and then return to the fasting level. The patient can tolerate fasting for 72 hours. Family history of diabetes is often lacking.

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