Symptoms of High Blood Sugar You Shouldn’t Ignore

23 Aug 2025

Symptoms of High Blood Sugar You Shouldn’t Ignore Experiencing symptoms of high blood sugar, also known as hyperglycemia, can be a significant warning...

Symptoms of High Blood Sugar You Shouldn’t Ignore

Experiencing symptoms of high blood sugar, also known as hyperglycemia, can be a significant warning sign for underlying health issues, most notably diabetes. Ignoring these symptoms can lead to severe complications. This article dives deep into understanding high blood sugar symptoms, why they occur, and what actions you should take. We'll cover both early and late-stage signs to help you stay proactive about your health.

What is High Blood Sugar (Hyperglycemia)?

Before diving into the symptoms, it's important to understand what high blood sugar actually means. It refers to a condition where the glucose (sugar) levels in your blood are higher than normal. This can happen when your body doesn't produce enough insulin (a hormone that helps glucose enter cells), or when your body can't effectively use the insulin it produces (insulin resistance). Untreated, this can lead to serious long-term health problems.

Early Symptoms of High Blood Sugar

Recognizing the early signs of hyperglycemia is crucial for timely intervention. These symptoms may develop gradually, making them easy to overlook. Here are some of the most common early warning signs:

  • Increased Thirst (Polydipsia): One of the first and most noticeable symptoms. Your body tries to flush out excess sugar through urine, leading to dehydration and increased thirst.
  • Frequent Urination (Polyuria): As mentioned above, your kidneys work overtime to eliminate the extra sugar, resulting in more frequent trips to the bathroom, especially at night.
  • Blurred Vision: High blood sugar can cause fluid to be pulled from the lenses of your eyes, affecting your ability to focus and leading to blurred vision. This is often temporary but can indicate a serious underlying issue if it persists.
  • Fatigue: Elevated blood sugar levels can interfere with your body’s ability to use glucose for energy, leaving you feeling tired and weak, even after adequate rest.
  • Headaches: Fluctuations in blood sugar can sometimes trigger headaches. While not always directly related to hyperglycemia, recurring headaches accompanied by other symptoms should be investigated.

Later, More Severe Symptoms

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If high blood sugar is left unmanaged, more severe symptoms can develop. These are a sign that your body is struggling to cope with the prolonged elevated glucose levels and requires immediate medical attention.

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  • Unexplained Weight Loss: Despite eating normally or even more than usual, you may experience unexplained weight loss. This is because your body isn't efficiently using glucose for energy, and starts breaking down muscle and fat instead.
  • Slow-Healing Cuts and Sores: High blood sugar can impair blood circulation and nerve function, hindering the body's ability to heal wounds effectively. Minor cuts and sores may take significantly longer to heal.
  • Frequent Infections: Elevated glucose levels can weaken the immune system, making you more susceptible to infections, such as yeast infections, skin infections, and urinary tract infections.
  • Dry, Itchy Skin: Dehydration caused by increased urination can lead to dry, itchy skin. Poor circulation can also contribute to skin problems.
  • Numbness or Tingling in Hands and Feet (Neuropathy): Prolonged exposure to high blood sugar can damage nerves, particularly in the extremities, leading to numbness, tingling, or pain. This condition is known as diabetic neuropathy.

Symptoms Requiring Immediate Medical Attention: DKA and HHS

Two severe complications of uncontrolled high blood sugar, Diabetic Ketoacidosis (DKA) and Hyperosmolar Hyperglycemic State (HHS), require immediate emergency medical care.

  • Diabetic Ketoacidosis (DKA): DKA primarily affects people with type 1 diabetes, but can also occur in those with type 2 diabetes. It develops when the body doesn't have enough insulin to use glucose for energy, so it starts breaking down fat, producing ketones as a byproduct. High levels of ketones are toxic and lead to DKA. Symptoms include:

    • Fruity-smelling breath
    • Nausea and vomiting
    • Abdominal pain
    • Shortness of breath
    • Confusion or loss of consciousness
  • Hyperosmolar Hyperglycemic State (HHS): HHS is more common in people with type 2 diabetes. It's characterized by extremely high blood sugar levels and severe dehydration. Symptoms include:

    • Extreme thirst
    • Dry mouth and skin
    • High fever
    • Weakness on one side of the body
    • Confusion or loss of consciousness

What to Do If You Experience Symptoms

If you experience any of the symptoms of high blood sugar, especially if they are persistent or severe, it's crucial to take action.

  1. Monitor Your Blood Sugar: If you have access to a blood glucose meter, check your blood sugar levels to see if they are elevated.
  2. Consult a Doctor: Schedule an appointment with your doctor to discuss your symptoms and get a proper diagnosis.
  3. Follow Your Doctor's Advice: If you are diagnosed with diabetes or prediabetes, follow your doctor's recommendations for managing your blood sugar levels, which may include lifestyle changes, medication, or both.

Managing High Blood Sugar Through Lifestyle Changes

For many people, lifestyle changes can significantly improve blood sugar control. These include:

  • Healthy Diet: Focus on a balanced diet rich in fruits, vegetables, whole grains, and lean protein. Limit sugary drinks, processed foods, and saturated fats.
  • Regular Exercise: Engage in regular physical activity to improve insulin sensitivity and help your body use glucose more efficiently. Aim for at least 30 minutes of moderate-intensity exercise most days of the week.
  • Weight Management: If you are overweight or obese, losing even a small amount of weight can make a significant difference in your blood sugar levels.
  • Stress Management: Stress can elevate blood sugar levels. Practice stress-reducing techniques like meditation, yoga, or spending time in nature.
  • Adequate Sleep: Aim for 7-8 hours of quality sleep per night. Lack of sleep can negatively impact insulin sensitivity.

Diagnosing High Blood Sugar

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Diagnosing high blood sugar typically involves one or more of the following blood tests:

  • Fasting Plasma Glucose (FPG) Test: Measures your blood sugar levels after an overnight fast.
  • Oral Glucose Tolerance Test (OGTT): Measures your blood sugar levels two hours after drinking a sugary drink.
  • A1C Test: Provides an average of your blood sugar levels over the past 2-3 months.

The following table provides the diagnostic criteria:

Test Normal Prediabetes Diabetes
Fasting Plasma Glucose (FPG) Less than 100 mg/dL 100 to 125 mg/dL 126 mg/dL or higher
Oral Glucose Tolerance Test (OGTT) Less than 140 mg/dL 140 to 199 mg/dL 200 mg/dL or higher
A1C Test Less than 5.7% 5.7% to 6.4% 6.5% or higher

The Importance of Early Detection and Management

Recognizing the symptoms of high blood sugar is the first step towards preventing serious health complications. Early detection and management of hyperglycemia or diabetes can significantly reduce the risk of long-term problems such as heart disease, kidney disease, nerve damage, and vision loss. Proactive monitoring, lifestyle changes, and appropriate medical care are key to maintaining healthy blood sugar levels and improving overall well-being. If you're concerned about your blood sugar, consult a healthcare professional promptly for assessment and guidance.