What is the difference between hyperglycemia and hypoglycemia?

Glycemia is the presence of sugar (glucose) in the blood. Hyperglycemia indicates excess glucose in the blood. Hypoglycemia refers to abnormally low presence of glucose in the blood.
Controlling blood glucose levels is the cornerstone of diabetes treatment. Using insulin injections and wisely consuming carbohydrates to maintain as stable and balanced blood glucose levels as possible keeps the body functioning properly and prevents long-term damage to vital organs. Monitoring your blood glucose to know whether the current levels are high or low is the only way to determine the appropriate treatment.
Sources:
https://www.rd.com/health/conditions/hyperglycemia-vs-hypoglycemia/

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What is hyperglycemia?

One has hyperglycemia, or high blood sugar, when they have excess glucose in the blood – a blood glucose level above 130 milligrams per deciliter (mg/dL) – and haven’t eaten for 8 hours.
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