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High Blood Sugar Symptoms: 11 Signs You Shouldn't Ignore

04 Sep 2025 by Hon-Chi Lee, M.D., Ph.D.

High Blood Sugar Symptoms: 11 Signs You Shouldn't Ignore

Living with high blood sugar, also known as hyperglycemia, can be a serious health concern. It's crucial to recognize the symptoms early to seek appropriate medical attention and manage the condition effectively. Ignoring high blood sugar symptoms can lead to long-term health complications. This article will guide you through 11 crucial signs you shouldn't ignore.

What is High Blood Sugar (Hyperglycemia)?

Hyperglycemia refers to a condition in which there's an excessive amount of glucose in the blood. This often occurs in people with diabetes when the body doesn’t produce enough insulin or when cells become resistant to insulin's effects. Understanding what causes high blood sugar is the first step in prevention. Managing Blood Sugar The Ultimate Diet And Food List For Glucose Control

Common Causes of High Blood Sugar

  • Diabetes: Type 1, Type 2, and gestational diabetes.
  • Diet: Consuming a diet high in carbohydrates and sugars.
  • Inactivity: Lack of physical exercise.
  • Stress: Stress hormones can raise blood sugar levels.
  • Medications: Certain medications, such as steroids.
  • Illness: Infections or illnesses can temporarily raise blood sugar.

11 Signs You Should Never Ignore

Let’s delve into the 11 critical high blood sugar symptoms that warrant immediate attention.

  1. Frequent Urination (Polyuria): When blood sugar levels are high, your kidneys try to filter out the excess glucose, leading to increased urine production.

  2. Excessive Thirst (Polydipsia): As you urinate more frequently, your body becomes dehydrated, triggering intense thirst. This is a classic high blood sugar symptom.

  3. Unexplained Weight Loss: High blood sugar can prevent your body from getting energy from food, causing it to burn fat and muscle for energy, leading to unexplained weight loss.

  4. Increased Hunger (Polyphagia): Despite eating, cells may not receive enough glucose for energy, leading to constant hunger.

  5. Blurred Vision: High blood sugar can cause the lens of the eye to swell, leading to blurry vision.

  6. Slow-Healing Cuts and Sores: High glucose levels can impair blood flow and nerve function, delaying the healing process.

  7. Dry, Itchy Skin: Dehydration caused by frequent urination can lead to dry, itchy skin.

  8. Frequent Infections: High blood sugar weakens the immune system, making you more susceptible to infections. This is a dangerous side effect of untreated hyperglycemia.

  9. Fatigue: Lack of glucose entering cells results in a feeling of constant tiredness and fatigue.

  10. Numbness or Tingling in Hands and Feet (Neuropathy): Prolonged high blood sugar can damage nerves, leading to numbness or tingling, a condition known as neuropathy.

  11. Recurring Yeast Infections: High glucose levels create a favorable environment for yeast growth, leading to recurrent yeast infections.

How to Monitor Your Blood Sugar

Monitoring blood sugar levels is essential for managing diabetes or identifying potential problems. Here’s how you can do it:

  • Home Blood Glucose Monitoring (BG): Using a blood glucose meter to check your blood sugar levels at home.
  • Continuous Glucose Monitoring (CGM): Wearing a device that continuously tracks your glucose levels throughout the day and night.
  • A1C Test: A blood test that measures your average blood sugar level over the past 2-3 months. This is often a key tool used by doctors to assess long-term blood sugar control.

What to Do If You Experience High Blood Sugar Symptoms

If you experience any of the symptoms of high blood sugar, it's important to take action immediately: The Definitive Blood Sugar Levels Chart Normal Prediabetes Amp Diabetes Ranges

  1. Check Your Blood Sugar: If you have diabetes, check your blood sugar levels to confirm hyperglycemia.

  2. Stay Hydrated: Drink plenty of water to help flush out excess glucose and prevent dehydration.

  3. Adjust Your Medication: If you have diabetes, follow your doctor's instructions for adjusting your medication or insulin dosage.

  4. Monitor Your Diet: Avoid sugary foods and drinks that can further raise your blood sugar.

  5. Consult a Healthcare Professional: Seek medical advice if your blood sugar remains high or if you experience severe symptoms.

Long-Term Complications of Untreated High Blood Sugar

Ignoring high blood sugar symptoms can lead to severe and potentially life-threatening long-term complications: Cgm Vs Blood Glucose Meter A Complete Comparison For 2024

  • Cardiovascular Disease: Increased risk of heart attacks, strokes, and high blood pressure.
  • Kidney Disease (Nephropathy): Damage to the kidneys that can lead to kidney failure.
  • Nerve Damage (Neuropathy): Nerve damage leading to pain, numbness, and tingling in the extremities.
  • Eye Damage (Retinopathy): Damage to the blood vessels in the retina, potentially leading to blindness.
  • Foot Problems: Increased risk of infections, ulcers, and amputation.

Tips for Preventing High Blood Sugar

Prevention is key. Here are some actionable tips to help maintain healthy blood sugar levels:

  • Maintain a Healthy Diet: Focus on foods that are low in the glycemic index, such as whole grains, lean proteins, and non-starchy vegetables.
  • Exercise Regularly: Physical activity helps improve insulin sensitivity and lowers blood sugar levels.
  • Manage Stress: Practice relaxation techniques, such as meditation or yoga, to reduce stress hormones.
  • Monitor Blood Sugar Regularly: If you have diabetes, monitor your blood sugar levels as directed by your healthcare provider.
  • Stay Hydrated: Drink plenty of water throughout the day.

Comparing Blood Sugar Levels (HTML Table Example)

It's important to understand what constitutes normal, prediabetic, and diabetic blood sugar ranges.

Category Fasting Blood Sugar (mg/dL) 2-Hour Postprandial Blood Sugar (mg/dL)
Normal Less than 100 Less than 140
Prediabetes 100 to 125 140 to 199
Diabetes 126 or higher 200 or higher

Conclusion

Recognizing and addressing high blood sugar symptoms promptly can significantly improve your health and well-being. By understanding the signs, monitoring your blood sugar, and adopting preventive strategies, you can effectively manage hyperglycemia and reduce the risk of long-term complications. Always consult with a healthcare professional for personalized advice and treatment. If you experience any of the 11 symptoms mentioned, don't ignore them – take action and prioritize your health today.

References and Further Reading