What is hypoglycemia (low blood sugar)?

Updated: Jul 23, 2020
  • Author: Osama Hamdy, MD, PhD; Chief Editor: Romesh Khardori, MD, PhD, FACP  more...
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Answer

Hypoglycemia is a clinical situation characterized by a reduction in plasma glucose concentration to a level that may induce symptoms or signs such as altered mental status and/or sympathetic nervous system stimulation. The glucose level at which an individual becomes symptomatic is highly variable, although a plasma glucose level less than 50 mg/dL is generally considered the threshold. Hypoglycemia typically arises from abnormalities in the mechanisms involved in glucose homeostasis.


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