16 Signs and Symptoms That You Have HIGH BLOOD SUGAR (And How to Treat It)

High blood glucose, also known as hyperglycemia, can cause major health complications in people with diabetes. Several factors can contribute to hyperglycemia—including poor food and physical activity choices, illness or disease, or not getting the right dosage of glucose-lowering medication.

Regular blood sugar testing is helpful for people with diabetes, because many people do not feel symptoms of high blood sugar.

16 Signs and Symptoms That You Have HIGH BLOOD SUGAR (And How to Treat It)

By the way, a symptom is any subjective evidence of disease, while a sign is any objective evidence of disease. Therefore, a symptom is a phenomenon that is experienced by the individual affected by the disease, while a sign is a phenomenon that can be detected by someone other than the individual affected by the disease. For examples, anxiety, pain, and fatigue are all symptoms. In contrast, a bloody nose is a sign of injured blood vessels in the nose that can be detected by a doctor, a nurse, or another observer.

Short-term symptoms of high blood sugar include:

  • excessive thirst
  • excessive urination
  • increased urination at night
  • blurry vision
  • sores that won’t heal
  • fatigue

If you experience symptoms of hyperglycemia, it’s important that you check your blood glucose levels. Untreated high blood sugar can lead to acute complications, such as diabetic ketoacidosis, and chronic complications, such as eye, kidney, or heart disease and/or nerve damage.


What Are the Symptoms of Hyperglycemia?

Hyperglycemia rarely causes noticeable symptoms. Symptoms can develop over several days or weeks, and the longer the condition is left untreated, the more severe the problem may become. The signs and symptoms of hyperglycemia include:

  • blood glucose level greater than 180 mg/dL
  • blurry vision
  • difficulty concentrating
  • frequent urination
  • headaches
  • high blood glucose
  • high levels of sugar in the urine
  • increased fatigue
  • increased thirst
  • weight loss

Causes Hyperglycemia

What Causes Hyperglycemia?

A number of conditions or factors can contribute to hyperglycemia, including:

  • being less active than normal
  • eating more carbohydrates than usual without adequate insulin
  • having more stress than usual—from an illness or from outside sources such as family conflict, relationship problems, or financial concerns (illness and stress can trigger hormones that can cause your blood sugar to rise)
  • taking less diabetes medication than normal
  • not injecting insulin properly or using expired insulin
  • skipping or forgetting insulin or medicine

How Is Hyperglycemia Treated?

Monitor your sugar levels.

An important part of managing your diabetes is checking your blood glucose level often—and then recording that number in a notebook or blood glucose log so you and your doctor can monitor your treatment plan. Knowing when your blood glucose levels are getting out of your target range can help you get blood sugar back under control before more significant problems arise.

Start moving and exercise.

Exercise is one of the best and most effective ways to keep your blood glucose levels where they should be, and lower them if they get high.  If you are on medications that increase insulin, be sure to talk to your healthcare team to decide the best times to exercise.  If you have complications such as nerve or eye damage, talk to your healthcare team about exercises that are best for your situation.

An important note: If your blood glucose is above 240 mg/dl, it’s vital that you check your urine for ketones. If you have ketones, do not exercise. Do not exercise if your blood glucose is above 300 mg/dL even without ketones. Call your doctor instead. Exercising when ketones are in your body may cause your blood glucose level to go even higher.

Mind your eating habits.

Meet with a dietitian or nutritionist and work together to construct a healthy, interesting selection of meals that can help prevent higher blood glucose levels.

Evaluate your treatment plan.

Depending on your personal health history and your experiences with hyperglycemia, your doctor may wish to change the amount, type, or timing of your diabetes medication. Do not adjust your medicines without first talking to your doctor or nurse educator.

In rare cases, emergency treatment is needed to lower your blood sugar. This type of treatment usually includes replacing fluids lost during excessive urination; electrolyte replacement, to replace minerals in your body lost as a result of inadequate insulin; and insulin therapy, to reverse the buildup of ketones in your blood.

If you have a history of hyperglycemia, talk with your doctor about safe, practical ways to control your blood glucose. Cutting back on the amount of certain foods you eat might help, as can changing your medication or insulin.

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