The harms of hypoglycemia

Written by Lin Xiang Dong
Endocrinology
Updated on September 08, 2024
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Hypoglycemia poses significant risks to the human body and mainly includes the following aspects: Firstly, hypoglycemia can lead to brain dysfunction, initially characterized by lack of mental focus, sluggish thinking and speech, dizziness, drowsiness, irritability, and other symptoms. In later stages, seizures, coma, and even death may occur. Secondly, recurrent hypoglycemic episodes can cause irreversible damage to the central nervous system, leading to changes in personality, mental disorders, dementia, etc. Thirdly, hypoglycemia can stimulate the cardiovascular system, trigger arrhythmias, myocardial infarction, and so on. Fourthly, prolonged hypoglycemic coma, if unnoticed, can result in death.

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Does low blood sugar cause confusion?

When hypoglycemia occurs, it is possible to experience confusion. This is because, under normal conditions, the glucose level in our brain tissue is only about 25% of that in our blood. After hypoglycemia occurs, the glucose concentration in our brain tissue will further decrease, leading to a state of sugar and oxygen deprivation in the brain. Severe cases can exhibit a range of neuropsychiatric symptoms such as behavioral changes and confusion, cognitive dysfunction, or even epileptic seizures. Some patients may also experience coma and permanent brain damage, typically seen in those with severe and prolonged hypoglycemia. Similarly, patients who repeatedly experience hypoglycemia often also suffer from brain atrophy. Therefore, confusion can occur during hypoglycemia.

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How is hypoglycemia treated?

The treatment for hypoglycemia is relatively simple; in most cases, it involves immediate consumption of sugar water to replenish energy, which can significantly alleviate the symptoms of hypoglycemia. If it is an occasional, single occurrence of hypoglycemia, normal status can be restored after replenishing energy. However, if hypoglycemia occurs repeatedly, it is necessary to seek timely medical treatment at a hospital to rule out some common diseases that cause hypoglycemia.

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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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Manifestations of Hypoglycemia

When the blood glucose level of a normal person falls below 2.8mmol/L, or for diabetics below 3.9mmol/L, it is referred to as hypoglycemia. Hypoglycemia refers to a clinical syndrome caused by an abnormally low glucose concentration in the blood due to various reasons. Clinically, it primarily manifests through symptoms stimulated by the sympathetic nervous system and affects on the central nervous system. Typical signs of hypoglycemia include excessive sympathetic nervous excitement, such as sweating, hunger, palpitations, trembling, and paleness. Additionally, there are manifestations of brain dysfunction, initially presenting as lack of concentration, slow thinking and speech, dizziness, drowsiness, restlessness, irritability, and bizarre behavior. In severe cases, seizures, coma, and even death may occur.

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Hypoglycemia emergency treatment procedure

Typically, when we consider a patient might have hypoglycemia, we follow the standard diagnostic procedures. First, we measure the patient's blood sugar level; if it is below 2.8 mmol/L, there is a high likelihood of hypoglycemia. Symptoms may include palpitations, dizziness, pale complexion, lack of concentration, lethargy, or even coma. Immediate action would involve giving the patient oral glucose solution or administrating glucose intravenously, followed by monitoring the patient’s clinical symptoms and blood sugar levels. If the patient's condition significantly improves after glucose provision, we can diagnose them with hypoglycemia. This is also a critical emergency procedure for hypoglycemia, which entails timely glucose supplementation. If the patient has recurrent hypoglycemia episodes, further detailed examinations should be conducted.