High Blood Sugar (Hyperglycemia)

High blood sugar, also known as hyperglycemia, is a condition characterized by an elevated level of glucose in the blood. It occurs when the body either cannot produce enough insulin or cannot effectively use the insulin it produces. Insulin is a hormone produced by the pancreas that helps to regulate blood sugar levels.

Causes of High Blood Sugar

High blood sugar can be caused by a variety of factors, including:

  • Diabetes: Both type 1 and type 2 diabetes can cause high blood sugar. Type 1 diabetes is an autoimmune disease in which the body's immune system attacks and destroys the cells in the pancreas that produce insulin, while type 2 diabetes is a metabolic disorder characterized by insulin resistance.
  • Obesity: Being overweight or obese can increase the risk of developing high blood sugar.
  • Physical inactivity: A sedentary lifestyle can contribute to high blood sugar.
  • Poor diet: Consuming a diet that is high in sugar, salt, and unhealthy fats can increase the risk of high blood sugar.
  • Certain medications: Some medications, such as steroids and certain psychiatric medications, can raise blood sugar levels.
  • Stress: Physical or emotional stress can cause an increase in blood sugar levels.

Symptoms of High Blood Sugar

The symptoms of high blood sugar may include:

  • Frequent urination: When there is too much glucose in the blood, the body tries to get rid of it by increasing urine production.
  • Increased thirst: As the body loses water through increased urination, it can become dehydrated, leading to feelings of thirst.
  • Blurred vision: High blood sugar can cause the lens in the eye to swell, leading to blurred vision.
  • Fatigue: High blood sugar can cause fatigue, as the body's cells are not getting the energy they need.
  • Cuts or wounds that are slow to heal: High blood sugar can affect the body's ability to heal wounds.
  • Recurring skin, gum, or bladder infections: High blood sugar can weaken the immune system, making it harder for the body to fight off infections.

Treatments for High Blood Sugar

The treatment for high blood sugar depends on the underlying cause of the condition. For people with diabetes, treatment may include:

  • Medications: Oral medications or insulin injections can help to lower blood sugar levels.
  • Lifestyle changes: Eating a healthy diet, getting regular exercise, and maintaining a healthy weight can help to manage high blood sugar.
  • Monitoring blood sugar levels: Regularly checking blood sugar levels can help to identify when levels are too high and make adjustments to treatment as needed.

For people without diabetes, treatment may include:

  • Lifestyle changes: Eating a healthy diet, getting regular exercise, and maintaining a healthy weight can help to lower blood sugar levels.
  • Medications: In some cases, medications such as metformin may be prescribed to help lower blood sugar levels.

Complications of High Blood Sugar

If left untreated, high blood sugar can lead to a range of complications, including:

  • Diabetic ketoacidosis: A life-threatening condition that occurs when the body produces high levels of ketones.
  • Hyperglycemic hyperosmolar nonketotic syndrome (HHNS): A condition characterized by extremely high blood sugar levels and dehydration.
  • Nerve damage: High blood sugar can damage the nerves, leading to numbness, tingling, and pain.
  • Kidney damage: High blood sugar can damage the kidneys, leading to kidney failure.
  • Blindness: High blood sugar can cause blindness by damaging the blood vessels in the eyes.

Prevention of High Blood Sugar

To prevent high blood sugar, it is recommended to:

  • Eat a healthy diet that is low in sugar and unhealthy fats.
  • Get regular exercise, such as walking or other aerobic activities.
  • Maintain a healthy weight.
  • Monitor blood sugar levels regularly if you have diabetes.
  • Manage stress through techniques such as meditation or yoga.

Article last updated on: 11th April 2025.
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