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High Blood Sugar Symptoms: 9 Warning Signs You Can't Afford to Ignore
16 Sep 2025 By Craig R. Jenkins, D.O.

High Blood Sugar Symptoms: 9 Warning Signs You Can't Afford to Ignore

Having high blood sugar, also known as hyperglycemia, can be a serious health concern if left unmanaged. Understanding the warning signs is crucial for early detection and prevention of long-term complications. This article will walk you through nine key symptoms you shouldn't ignore, along with explanations of why they occur and what steps you can take. Surprising Foods That Help Stabilize Your Blood Glucose Levels

What is High Blood Sugar?

High blood sugar happens when your body doesn't have enough insulin (the hormone that helps sugar get from your blood into your cells for energy) or when your body can't use insulin properly. This can be due to several factors including diabetes, stress, certain medications, or illness. Chronically elevated blood sugar levels can lead to significant damage to your organs, including your heart, kidneys, and nerves. Normal Blood Sugar For Non Diabetics The Complete Guide

9 Warning Signs of High Blood Sugar

Recognizing the signs of high blood sugar is the first step in managing your health. Here are nine symptoms you should be aware of:

  1. Frequent Urination (Polyuria): When your blood sugar is high, your kidneys try to flush out the excess glucose through urine. This leads to more frequent trips to the bathroom, especially at night.
  2. Increased Thirst (Polydipsia): Because your body is losing fluids through frequent urination, you may feel intensely thirsty. This is your body's way of trying to rehydrate.
  3. Unexplained Weight Loss: High blood sugar can prevent your body from getting energy from glucose. As a result, your body may start burning muscle and fat for fuel, leading to unexpected weight loss, even if you're eating normally.
  4. Increased Hunger (Polyphagia): Paradoxically, even with high blood sugar, your cells may not be getting enough glucose for energy. This can trigger a persistent feeling of hunger, even after eating.
  5. Blurry Vision: High blood sugar can affect the lens of your eye, causing it to swell and distort your vision. This can result in blurry or double vision.
  6. Fatigue and Weakness: Without proper glucose uptake, your cells are starved of energy, leading to feelings of fatigue, tiredness, and overall weakness.
  7. Slow-Healing Cuts and Sores: High blood sugar can impair blood circulation and the body’s ability to heal. This can cause cuts and sores to take longer to heal, increasing the risk of infection.
  8. Dry, Itchy Skin: High blood sugar can lead to dehydration, which can manifest as dry, itchy skin. Poor circulation can also contribute to skin problems.
  9. Frequent Infections: High blood sugar can weaken your immune system, making you more susceptible to infections, particularly urinary tract infections, yeast infections, and skin infections.

Factors That Contribute to High Blood Sugar

Several factors can contribute to high blood sugar levels. Understanding these factors can help you take preventative measures.

  • Diabetes: The most common cause of high blood sugar is diabetes, either type 1 or type 2.
  • Diet: A diet high in sugary drinks, processed foods, and refined carbohydrates can quickly raise blood sugar levels.
  • Lack of Physical Activity: Exercise helps your body use glucose for energy, so a sedentary lifestyle can contribute to high blood sugar.
  • Stress: When you're stressed, your body releases hormones that can raise blood sugar levels.
  • Illness: Certain illnesses can temporarily raise blood sugar levels.
  • Medications: Some medications, such as steroids, can increase blood sugar.

What To Do If You Suspect High Blood Sugar

If you experience any of the symptoms mentioned above, it's important to take action.

  1. Check Your Blood Sugar: If you have a glucose meter, check your blood sugar level. This is the most accurate way to determine if your blood sugar is high.
  2. Contact Your Healthcare Provider: Talk to your doctor about your symptoms and blood sugar readings. They can diagnose the underlying cause and recommend appropriate treatment.
  3. Follow Your Doctor's Recommendations: If you have diabetes, carefully follow your doctor's instructions for managing your blood sugar, including diet, exercise, and medication.
  4. Adjust Your Diet: Reduce your intake of sugary drinks, processed foods, and refined carbohydrates. Focus on whole, unprocessed foods, including fruits, vegetables, and whole grains.
  5. Increase Physical Activity: Aim for at least 30 minutes of moderate-intensity exercise most days of the week.
  6. Manage Stress: Practice stress-reducing techniques like meditation, yoga, or deep breathing exercises.

Monitoring Your Blood Sugar Levels

Regularly monitoring your blood sugar levels is crucial, especially if you have diabetes or are at risk of developing it. This can be done with a home glucose meter or through regular blood tests at your doctor's office. Keeping track of your blood sugar readings can help you and your doctor make informed decisions about your treatment plan.

Long-Term Complications of Uncontrolled High Blood Sugar

Ignoring high blood sugar can lead to serious long-term health problems:

  • Heart Disease: High blood sugar damages blood vessels, increasing the risk of heart attacks and strokes.
  • Nerve Damage (Neuropathy): High blood sugar can damage the nerves, leading to numbness, tingling, and pain, particularly in the hands and feet.
  • Kidney Damage (Nephropathy): High blood sugar can damage the kidneys, potentially leading to kidney failure.
  • Eye Damage (Retinopathy): High blood sugar can damage the blood vessels in the retina, leading to vision loss and blindness.
  • Foot Problems: Nerve damage and poor circulation can lead to foot ulcers, infections, and potentially amputation.

Understanding Blood Sugar Ranges

Different blood sugar ranges are considered normal or abnormal depending on whether you're fasting (haven't eaten for at least eight hours) or after eating. Here's a general guideline: Why Is My Fasting Blood Sugar High 7 Common Causes And How To Fix Them

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

Note: These ranges are general guidelines. Your healthcare provider may have different target ranges based on your individual needs.

Conclusion

Recognizing the warning signs of high blood sugar is crucial for preventing serious health complications. If you experience any of the symptoms discussed in this article, consult your doctor promptly. Early diagnosis and effective management can help you maintain healthy blood sugar levels and reduce your risk of long-term health problems associated with hyperglycemia. Don’t ignore the signals your body is sending you – taking proactive steps can make a significant difference in your overall health and well-being.

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