Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Low blood sugar
Medically reviewed by Min Clinic Staff | Updated: January 2026
Low blood sugar: A low blood level of the sugar glucose. Also called hypoglycemia.
Hypoglycemia is only significant when it is associated with symptoms. It has many causes including drugs such as insulin, liver disease, surgical absence of the stomach, pre-diabetes, and rare tumors that release excess insulin.