Hypoglycemia (hypoglycæmia in the UK) is a medical term referring to a pathologic state produced by a lower than normal amount of sugar (glucose) in the blood. The term hypoglycemia literally means "low blood sugar". Hypoglycemia can produce a variety of symptoms and effects but the principal problems arise from an inadequate supply of glucose as fuel to the brain, resulting in impairment of function (neuroglycopenia). Derangements of function can range from vaguely "feeling bad" to coma, and (rarely) permanent brain damage or death. Hypoglycemia can arise from many causes, and can occur at any age. The most common forms of moderate and severe hypoglycemia occur as a complication of treatment of diabetes mellitus with insulin or oral medications.
Endocrinologists (specialists in disorders of blood glucose metabolism) typically consider the following criteria (referred to as Whipple's triad) as proving that an individual's symptoms can be attributed to hypoglycemia:
However, not everyone has accepted these suggested diagnostic criteria, and even the level of glucose low enough to define hypoglycemia has been a source of controversy in several contexts. For many purposes, plasma glucose levels below 70 mg/dl or 3.9 mmol/L are considered hypoglycemic, but these issues are elaborated in more detail below.
More on [ Hypoglycemia ]

How Does Hypoglycemia Affect Our Lives? - Information about this condition and its causes. Share stories, recipes, and ask questions in the forum.
Hypoglycemia - Article about low blood sugar includes causes, risk factors, and prevention.
Meta Description: [ A Boston, Massachusetts hospital, Brigham and Womens Hospital is a leader in womens health issues, patient care and medical research. BWH is consistently named at the top of the US News and World Reports hospital rankings. ]
Hypoglycemia Diet - Learn symptoms, causes, and nutrition facts. View a sample menu that includes food groups, fiber sources, and serving measurements.
Meta Description: [ Jackson Gastroenterology's Web Site
includes office information and paient education material on digestive and
liver disorders, and nutrition. Endoscopic procedures that help in diagnosis
and treatment are also described. ]
NIDDK: Hypoglycemia - Tells what it is, symptoms, and causes in people with or without diabetes. Includes tips for eating right.
Meta Description: [ Hypoglycemia ]
TeensHealth: What Is Hypoglycemia? - Information includes causes, symptoms, who gets it, and how it is treated. Learn why few people actually have this condition.
Meta Description: [ Lots of people wonder if they have hypoglycemia, but the condition is not common in teens. Get the facts on hypoglycemia. ]
| Olivia Raby, Miklos Feher, Martin Kelly and Richie Doyle | |
| Next Video | |