How to check for hypoglycemia

Written by Lin Xiang Dong
Endocrinology
Updated on August 31, 2024
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We usually diagnose hypoglycemia based on the following three criteria. The first is the presence of hypoglycemic symptoms, such as palpitations, tremors, sweating, dizziness, etc. If these symptoms are present, we must immediately consider the possibility of hypoglycemia, and then proceed to monitor blood glucose levels. If the blood glucose reading is below 2.8 for non-diabetic patients and below 3.9 for diabetic patients, hypoglycemia can be considered. Subsequently, the patient should consume sugary water, and if the symptoms significantly alleviate after this, a diagnosis of hypoglycemia can be established. Moreover, if the patient does not have a history of diabetes, does not use hypoglycemic drugs, but experiences recurring episodes of hypoglycemia, further testing is required, such as a fasting test, checking C-peptide levels, insulin levels, etc., to rule out insulinoma.

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Causes of Hypoglycemia in Females

The causes of hypoglycemia in women can be related to various factors, including drug-induced, hepatic, pancreatic, non-pancreatic tumors, renal, endocrine issues, as well as excessive consumption or insufficient intake, among others. For women, apart from organic lesions, common causes include excessive hunger, intense exercise, or chronic diarrhea, which can lead to hypoglycemia. Some women experience hypoglycemia due to lactation or pregnancy without timely replenishment of energy. Additionally, a common condition seen in women is idiopathic functional hypoglycemia, often found in neurotic women, which typically presents with symptoms of hunger and sweating, usually with few physical signs. Characteristically, it involves early-occurring reactive hypoglycemia that generally resolves on its own in less than 30 minutes, with blood glucose tests showing slightly decreased levels and normal or slightly elevated insulin levels in the blood.

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How to alleviate hypoglycemia

In general, for hypoglycemia, if a diabetic's blood sugar falls below 3.9 or a non-diabetic's blood sugar falls below 2.8, it is considered hypoglycemia. In terms of treatment, if the patient is conscious and experiences symptoms such as dizziness, palpitations, cold sweat, and hunger, it is recommended to measure blood sugar immediately and then eat foods that quickly increase blood sugar levels, such as chocolate or candy. If hypoglycemia in a patient is not corrected in time, it can lead to coma. If the patient is comatose, it is advised to call emergency services immediately and administer a 50% glucose intravenous injection to correct the hypoglycemia.

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Is hypoglycemia dangerous?

For diabetic patients, hypoglycemia is defined as glucose levels less than 4 mmol/L, and for non-diabetic individuals, or healthy people, low blood sugar is characterized by levels less than 2.8 mmol/L. Hypoglycemia initially causes metabolic abnormalities in the brain since brain cells in the middle of the brain can't break down fats or proteins; they can only use the simplest sugars, which is the glucose in our blood, as their energy source. When the concentration of sugar in the blood decreases, the brain cells fail to absorb enough energy, which can lead to abnormalities in brain function, resulting in symptoms like fatigue and drowsiness. If glucose is not consumed at this point, the further deficiency in energy for brain cells may lead to coma, making hypoglycemia a very dangerous condition.

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Is hypoglycemia dangerous?

For hypoglycemia that has already occurred, as long as we can accurately and promptly identify the onset of hypoglycemia and provide appropriate treatment, the hypoglycemia can be alleviated and cured. Occasional hypoglycemia is not very dangerous after being handled, but if hypoglycemia occurs frequently and does not receive timely rescue, it can cause significant damage to the human body, especially the central nervous system, causing damage to brain cells. If hypoglycemia lasts too long, it can even endanger life, leading to coma, death, etc.

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How to treat hypoglycemia?

First, we need to accurately identify what hypoglycemia is. We often judge the occurrence of hypoglycemia based on symptoms, such as common symptoms including palpitations, dizziness, pale complexion, general weakness, trembling limbs, sweating, etc. When these symptoms appear, we should immediately use a rapid glucose meter to measure the fingertip blood sugar. If the blood sugar is below 2.8, then the diagnosis of hypoglycemia is confirmed. We immediately provide sugary drinks or other forms of energy substances, and the symptoms of low blood sugar can be greatly relieved.