What are the symptoms of hypoglycemia?

Written by Li Hui Zhi
Endocrinology
Updated on September 17, 2024
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Hypoglycemia, in fact, is diagnosed in healthy individuals when blood glucose levels are less than or equal to 2.8 mmol/L, and in diabetic patients when levels are less than or equal to 3.9 mmol/L. Common symptoms of mild hypoglycemia typically involve sympathetic nervous system activation, such as dizziness, palpitations, cold sweats, trembling hands, and a feeling of hunger. It is recommended that food be consumed promptly when these symptoms occur. If hypoglycemia is not immediately addressed, severe outcomes can occur, including altered mental status, coma, and unresponsiveness. In some cases, hypoglycemia may trigger seizures or abnormal cerebral vascular accidents, such as stroke or cardiac ischemia, leading to a heart attack. Therefore, preventing hypoglycemia is of utmost importance.

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Causes of Hypoglycemia in Pregnant Women

Hypoglycemia is a relatively common clinical phenomenon in pregnant women during pregnancy, mainly manifesting as dizziness, blurred vision, and even fainting. This occurs because the metabolism of pregnant women accelerates during pregnancy, while the secretion of the islets is not correspondingly increased. This results in the physiological function of the islets being very active, which can easily lead to low blood sugar in expectant mothers, causing symptoms such as dizziness and fatigue due to hypoglycemia. Additionally, hormonal changes during pregnancy can lead to decreased appetite, nausea, vomiting, irregular eating habits, and malnutrition in pregnant women. Despite this, energy consumption still occurs, which can also lead to hypoglycemia.

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What to eat for low blood sugar?

For already occurring hypoglycemia, our treatment goal is to quickly alleviate the symptoms of hypoglycemia. The primary method is to provide sugar, either through sugar water, sugary drinks, or sugar-containing fruits, bread, etc. After providing sugar, the symptoms of hypoglycemia can be quickly relieved. At the same time, to prevent hypoglycemia, we need to do the following: first, eat meals regularly every day, avoiding eating too late or not enough. Second, it is not advisable to exercise on an empty stomach; it is appropriate to eat something before exercising. Third, avoid excessive alcohol consumption, as it can inhibit the conversion of liver glycogen into glucose in the body, making it easy to develop hypoglycemia, so avoid excessive drinking. Fourth, once common symptoms such as palpitations, dizziness, sweating, and other symptoms occur, we should quickly provide sugar.

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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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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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Does hypoglycemia spread?

Hypoglycemia is not a contagious disease, so it is not transmittable. Hypoglycemia is primarily caused by excessive secretion of insulin in the body, or by consuming too little sugary food, leading to abnormally low blood sugar levels and certain clinical symptoms such as palpitations, trembling hands, fatigue, and cold sweats. Therefore, it is caused by pathological reasons within the body itself, and not by infectious bacteria or viruses from external sources, so it is not contagious. However, when hypoglycemia occurs, it is necessary to promptly consume sugary foods to alleviate the symptoms and prevent more serious damage to the body.