What is Hyperglycemia?

Hyperglycemia is the medical term for high blood sugar, which arises due to the body’s inability to remove glucose from the blood so that cells can use it for energy. The condition usually only affects people with diabetes because these individuals have problems with insulin – the hormone required for glucose uptake.


Hyperglycemia symptoms tend to develop over the course of several weeks and may include the following:

  • Dry mouth and increased thirst leading to frequent intake of water. This is referred to as polydipsia.
  • Increased urination, particularly at night, which is referred to as polyuria.
  • Increased hunger and food intake, which is referred to as polyphagia.
  • Fatigue

Further symptoms that may eventually develop include blurred vision, weight loss, nerve damage, kidney problems and heart problems.


People who have diabetes are unable to break glucose down into energy due either to an inadequate level of insulin or insulin failing to work properly. This means glucose remains in the blood causing a high blood sugar level. Diabetes occurs in two forms, type 1 diabetes and type 2 diabetes.

Type 1 diabetes

Also called insulin-dependent diabetes mellitus (IDDM), type 1 diabetes describes a condition where the body fails to produce an adequate level of insulin. Individuals with this condition require lifelong insulin treatment.

Type 2 diabetes

Also called non-insulin-dependent diabetes mellitus (NIDDM), type 2 diabetes describes a condition where the body either fails to produce an adequate level of insulin or the insulin that is produced is not used properly (insulin resistance). This type of diabetes is often linked to overweight or obesity and usually affects people over the age of 40.

Diagnosis and treatment

Diagnosis is made based on symptoms and a blood sugar test. The insulin treatment for type 1 diabetes is available in several forms including long-acting, short-acting and rapid-acting therapies. A person with type 1 diabetes will probably receive a combination of these different preparations. The insulin needs to be injected and people with type 1 diabetes are usually given an insulin pen, also called an auto-injecter.

People who have type 2 diabetes or at risk of developing the condition are asked to make lifestyle, exercise and dietary changes to bring their blood sugar level down. Although these changes may improve the blood sugar level, people with type 2 diabetes may eventually require medication to control their condition. Examples of these medications include metformin, sulphonylureas, glitazones, gliptins and acarbose.

Further Reading

Last Updated: Feb 26, 2019

Dr. Ananya Mandal

Written by

Dr. Ananya Mandal

Dr. Ananya Mandal is a doctor by profession, lecturer by vocation and a medical writer by passion. She specialized in Clinical Pharmacology after her bachelor's (MBBS). For her, health communication is not just writing complicated reviews for professionals but making medical knowledge understandable and available to the general public as well.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Mandal, Ananya. (2019, February 26). What is Hyperglycemia?. News-Medical. Retrieved on January 28, 2020 from https://www.news-medical.net/health/What-is-Hyperglycemia.aspx.

  • MLA

    Mandal, Ananya. "What is Hyperglycemia?". News-Medical. 28 January 2020. <https://www.news-medical.net/health/What-is-Hyperglycemia.aspx>.

  • Chicago

    Mandal, Ananya. "What is Hyperglycemia?". News-Medical. https://www.news-medical.net/health/What-is-Hyperglycemia.aspx. (accessed January 28, 2020).

  • Harvard

    Mandal, Ananya. 2019. What is Hyperglycemia?. News-Medical, viewed 28 January 2020, https://www.news-medical.net/health/What-is-Hyperglycemia.aspx.


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News-Medical.Net.
Post a new comment
You might also like... ×
Study shows how high glucose damages the vascular system