Diabetes and High Blood Sugar: Causes, Symptoms, Risks and How to Manage It

Diabetes is a chronic health condition that affects how the body regulates blood sugar (glucose). When blood sugar levels remain consistently high, it can gradually damage vital organs, including the heart, kidneys, eyes and nerves. While diabetes is a common condition, many people may not realise they have high blood sugar until symptoms become noticeable or complications develop.

In this article, we take a close look at what causes high blood sugar, understand its symptoms and know how to manage with lifestyle changes.

What Is High Blood Sugar?

High blood sugar, or hyperglycaemia, occurs when there is too much glucose in the bloodstream. Normally, the body uses insulin to regulate blood glucose levels. However, in people with diabetes, the body either does not produce enough insulin or cannot use it properly. As a result, glucose builds up in the blood instead of being used by the cells for energy.

If left unmanaged, persistently high blood sugar can increase the risk of several health complications, including cardiovascular disease, kidney damage, nerve problems and vision loss.

What Causes High Blood Sugar?

Several factors can contribute to elevated blood sugar levels. Some of the common causes include:

1. Insufficient Insulin Production: In Type 1 diabetes, the immune system attacks the insulin-producing cells in the pancreas, resulting in little or no insulin production.

2. Insulin Resistance: In Type 2 diabetes, the body’s cells do not respond effectively to insulin. This makes it difficult for glucose to enter the cells, causing blood sugar levels to rise.

3. Unhealthy Eating Habits: Consuming excessive amounts of sugary foods, refined carbohydrates and processed foods can make blood sugar management more difficult.

4. Lack of Physical Activity: A sedentary lifestyle can contribute to insulin resistance and increase the risk of Type 2 diabetes.

5. Stress: Physical or emotional stress can trigger the release of hormones that raise blood sugar levels.

Now let’s move to the warning signs of this condition.

What Are the Early Symptoms of High Blood Sugar?

High blood sugar does not always cause noticeable symptoms in the early stages. However, as glucose levels increase, the body may start showing certain warning signs.

Some common symptoms of hyperglycaemia include:

1. Frequent Urination: When blood sugar levels become too high, the kidneys try to remove excess glucose through urine. This can make you urinate more frequently than usual.

2. Increased Thirst: Frequent urination can cause the body to lose more fluids, leading to excessive thirst and dehydration.

3. Increased Hunger: Despite having high blood sugar, the body’s cells may not receive enough glucose for energy. This can make you feel hungry more often.

4. Unexplained Weight Loss: Some people with uncontrolled diabetes may lose weight even when they are eating normally or more than usual.

5. Constant Fatigue: When glucose cannot enter the cells effectively, the body may not get enough energy, resulting in persistent tiredness.

6. Blurred Vision: High blood sugar can cause fluid changes in the eyes, temporarily affecting the ability to see clearly.

7. Slow-Healing Wounds: Cuts, sores and injuries may take longer to heal because diabetes can affect blood circulation and the body’s ability to fight infections.

8. Frequent Infections: People with poorly controlled diabetes may be more prone to skin, urinary tract and fungal infections.

9. Tingling or Numbness: Persistently high blood sugar can damage nerves over time, particularly in the hands and feet.

10. Dry Mouth and Itchy Skin: Dehydration associated with high blood sugar can cause dry mouth and itchy skin.

What Are the Normal and High Blood Sugar Levels?

Blood sugar levels are measured through blood tests. The results help doctors determine whether a person has normal glucose levels, prediabetes or diabetes.

Here are the commonly used blood sugar ranges for non-pregnant adults:

These are diagnostic thresholds, not individual treatment targets. In most cases, an abnormal result needs confirmation through repeat testing unless there are clear symptoms of diabetes with a diagnostic blood glucose result.

What Is the Difference Between Type 1 and Type 2 Diabetes?

Diabetes is broadly classified into different types, with Type 1 and Type 2 being the most common.

Type 1 Diabetes: This is an autoimmune condition in which the immune system attacks the insulin-producing cells of the pancreas. As a result, the body produces little or no insulin. People with Type 1 diabetes require insulin treatment to manage their blood sugar levels.

Type 2 Diabetes: This is the most common form of diabetes. It develops when the body becomes resistant to insulin or does not produce enough insulin to maintain normal blood glucose levels. It is associated with several factors, including genetics, excess body weight and physical inactivity.

What Health Problems Can High Blood Sugar Cause?

Persistently elevated blood sugar levels can affect several organs and systems in the body. If diabetes remains uncontrolled, it may lead to serious long-term complications.

• Heart Disease: Diabetes increases the risk of heart attacks, strokes and other cardiovascular problems.
• Kidney Damage: High blood sugar can damage the tiny blood vessels in the kidneys, potentially leading to diabetic kidney disease.
• Nerve Damage: Diabetic neuropathy can cause pain, tingling, numbness or loss of sensation, particularly in the feet.
• Eye Problems: Diabetes can damage the blood vessels in the retina, increasing the risk of diabetic retinopathy and vision loss.
• Foot Infection: Reduced blood circulation and nerve damage can make foot injuries difficult to detect and heal.
• Oral Health Problems: People with diabetes may have a higher risk of gum disease and other dental infections.

In severe cases, very high blood sugar can lead to medical emergencies such as diabetic ketoacidosis (DKA) or hyperosmolar hyperglycaemic state (HHS).

How Can You Manage High Blood Sugar?

Managing blood sugar requires a combination of healthy lifestyle habits, regular monitoring and appropriate medical treatment.

Here are some ways to keep blood glucose levels under control:

1. Follow a Balanced Diet: Include vegetables, whole grains, pulses, lean proteins and fibre-rich foods in your daily meals. Limit sugary drinks, sweets and highly processed foods.

2. Exercise Regularly: Physical activity helps the body use insulin more effectively. Aim for at least 150 minutes of moderate-intensity physical activity per week, if medically appropriate.

3. Monitor Blood Sugar Levels: Regular monitoring can help you understand how your body responds to food, exercise, stress and medication.

4. Maintain a Healthy Weight: If you are overweight, even modest weight loss can improve insulin sensitivity and help manage Type 2 diabetes.

5. Take Medicines as Prescribed: Follow your doctor’s advice regarding insulin or other diabetes medications. Do not change or stop your medication without medical guidance.

6. Get Enough Sleep: Poor sleep can affect hormones involved in blood sugar regulation. Try to maintain a consistent sleep schedule.

7. Manage Stress: Stress can influence blood glucose levels. Activities such as walking, meditation and breathing exercises may help.

8. Attend Regular Health Check-ups: Keep track of your HbA1c, blood pressure, cholesterol, kidney function and eye health.

Warning Signs You Should Never Ignore

If you experience persistent symptoms such as excessive thirst, frequent urination, unexplained weight loss or constant fatigue, consult a healthcare professional and get your blood sugar tested.

However, certain symptoms require immediate medical attention. These include:

• Vomiting and severe abdominal pain.
• Difficulty breathing or unusually deep, rapid breathing.
• Fruity-smelling breath.
• Severe dehydration or extreme weakness.
• Confusion, drowsiness or loss of consciousness.

Recognising the early warning signs and getting tested at the right time can help prevent complications and improve quality of life. If you have diabetes or are at risk of developing it, work with your healthcare professional to create a personalised blood sugar management plan. Remember, keeping blood sugar under control is an important step towards protecting your long-term health.

Disclaimer: This article is intended for general informational purposes and does not replace professional medical advice, diagnosis or treatment. Consult a qualified healthcare professional before making decisions about cancer screening.

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