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Don't Ignore These 9 High Blood Sugar Symptoms (Hyperglycemia Warning Signs)
18 Sep 2025 By Maria L. Collazo-Clavell, M.D.

Don't Ignore These 9 High Blood Sugar Symptoms (Hyperglycemia Warning Signs)

High blood sugar, also known as hyperglycemia, is a condition where there's an excessive amount of glucose circulating in the blood. It’s a common concern for individuals with diabetes, but it can also affect those without a diagnosed condition. Recognizing the early warning signs of hyperglycemia is crucial for preventing serious health complications. In this article, we'll explore nine critical symptoms you should never ignore.

What is Hyperglycemia and Why Does It Matter?

Hyperglycemia occurs when the body either doesn't produce enough insulin (a hormone that helps glucose enter cells for energy) or can't effectively use the insulin it produces. This can lead to a buildup of glucose in the bloodstream. Ignoring persistent high blood sugar levels can result in long-term complications like nerve damage (neuropathy), kidney damage (nephropathy), cardiovascular disease, and vision problems (retinopathy). Identifying the symptoms early allows for timely intervention and management, greatly reducing the risk of these severe health issues. How Insulin Works To Balance Your Blood Sugar A Simple Guide

9 Warning Signs of High Blood Sugar

Being aware of these symptoms can help you take prompt action and prevent potential health complications. Let's dive into the nine crucial warning signs:

  1. Frequent Urination (Polyuria): One of the earliest signs of high blood sugar is the need to urinate more often than usual, especially at night. This happens because the kidneys are working overtime to filter out excess glucose from the blood.

  2. Increased Thirst (Polydipsia): Excessive thirst often accompanies frequent urination. As the body loses fluids through frequent urination, you feel increasingly thirsty and may find yourself drinking significantly more water than normal. Why Is My Fasting Blood Sugar High 4 Common Causes

  3. Unexplained Weight Loss: Despite eating normally or even more than usual, you might experience unexplained weight loss. This occurs because the body isn’t able to use glucose for energy and starts breaking down muscle and fat instead. This is especially alarming if there is no specific weight loss diet in place.

  4. Blurred Vision: High blood sugar can cause the lens of the eye to swell, leading to blurred vision. This can fluctuate throughout the day depending on your blood sugar levels. While vision changes are also common with age, this is a critical symptom. Are You On A Blood Sugar Rollercoaster 6 Signs You Need Better Balance

  5. Fatigue: Feeling unusually tired and weak can be a sign that your body isn't getting the energy it needs from glucose. Glucose is meant to fuel your cells, but when it can't enter the cells properly, fatigue sets in.

  6. Slow-Healing Sores or Cuts: Hyperglycemia can impair the body's ability to heal, making cuts and sores take longer to heal and increasing the risk of infection.

  7. Dry, Itchy Skin: Dehydration caused by frequent urination can lead to dry, itchy skin. Additionally, high blood sugar can damage nerves, contributing to skin issues.

  8. Frequent Infections: High blood sugar can weaken the immune system, making you more susceptible to infections, such as yeast infections, urinary tract infections, and skin infections.

  9. Increased Hunger (Polyphagia): Even after eating, you might feel persistently hungry. This occurs because the body's cells aren't receiving enough glucose, leading to constant hunger signals.

Risk Factors for Hyperglycemia

Several factors can increase your risk of developing hyperglycemia. Understanding these risk factors can help you take preventative measures. Key risk factors include:

  • Diabetes: Individuals with Type 1 or Type 2 diabetes are at a higher risk.
  • Family History: Having a family history of diabetes increases your chances.
  • Obesity: Being overweight or obese significantly raises the risk.
  • Sedentary Lifestyle: Lack of physical activity can contribute to insulin resistance.
  • Certain Medications: Some medications, like corticosteroids, can elevate blood sugar levels.
  • Stress: Chronic stress can impact blood sugar control.
  • Polycystic Ovary Syndrome (PCOS): PCOS is associated with insulin resistance.

What to Do if You Suspect Hyperglycemia

If you experience several of the symptoms listed above, it's crucial to take action promptly. Here's what you should do:

  1. Monitor Your Blood Sugar: If you have a blood glucose meter, check your blood sugar levels to see if they're elevated. Normal fasting blood sugar is typically below 100 mg/dL, while a reading between 100-125 mg/dL indicates prediabetes, and 126 mg/dL or higher indicates diabetes.
  2. Consult Your Healthcare Provider: Make an appointment with your doctor to discuss your symptoms and blood sugar readings. They can perform additional tests, such as an A1C test, to assess your average blood sugar levels over the past two to three months.
  3. Follow Medical Advice: If you're diagnosed with diabetes or prediabetes, follow your doctor's recommendations for managing your blood sugar. This may include lifestyle changes like diet and exercise, as well as medication.

Lifestyle Changes to Manage High Blood Sugar

Making certain lifestyle adjustments can help manage and prevent hyperglycemia. These changes include:

  • Dietary Modifications: Adopt a balanced diet that is low in processed foods, sugary drinks, and refined carbohydrates. Focus on consuming whole grains, lean proteins, and plenty of fruits and vegetables.
  • Regular Exercise: Engage in regular physical activity, such as walking, jogging, swimming, or cycling. Aim for at least 150 minutes of moderate-intensity exercise per week.
  • Weight Management: Maintain a healthy weight through a combination of diet and exercise.
  • Stress Management: Practice stress-reduction techniques, such as yoga, meditation, or deep breathing exercises.
  • Hydration: Drink plenty of water to stay hydrated, especially when blood sugar levels are high.

Foods to Avoid and Foods to Embrace

Knowing which foods to limit and which to incorporate into your diet can significantly impact your blood sugar control.

Foods to Avoid Foods to Embrace
Sugary drinks (soda, juice) Non-starchy vegetables (broccoli, spinach)
Processed foods (fast food, packaged snacks) Lean proteins (chicken, fish, beans)
Refined carbohydrates (white bread, pasta) Whole grains (brown rice, quinoa)
Sweets (candy, desserts) Fruits (in moderation, with lower glycemic index)
High-fat foods (fried foods, processed meats) Healthy fats (avocados, nuts, olive oil)

Conclusion: Prioritize Your Health

Recognizing and addressing the symptoms of high blood sugar is essential for preventing serious health complications. By being aware of the nine warning signs discussed in this article, taking prompt action when needed, and making positive lifestyle changes, you can effectively manage your blood sugar levels and prioritize your overall health and well-being. Don't ignore these signs – your health depends on it.

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