preventing high sugar

Overview

High blood sugar (also called hyperglycemia) means there is too much sugar (glucose) in the blood. Over time, high blood sugar can lead to conditions like prediabetes and type 2 diabetes. Preventing high blood sugar means keeping your blood sugar within a healthy range through lifestyle habits, regular monitoring, and medical advice when needed.

Yes. High blood sugar and prediabetes are common worldwide. Millions of people have blood sugar levels that are higher than normal but not yet in the diabetes range, and this is often preventable.

High blood sugar can affect anyone, but you are more likely to develop it if you are over 40, have a family history of diabetes, are overweight, or are not physically active. Some ethnic groups have a higher risk, and it also becomes more common with age.

Symptoms

Common symptoms

• Feeling very thirsty more often than usual
• Urinating (peeing) more often, especially at night
• Feeling tired or low in energy
• Blurred vision
• Slow-healing cuts or sores
• Tingling or numbness in hands or feet

Symptoms in children

• Children may show the same signs as adults, such as thirst and frequent urination, but they may also lose weight without trying, seem unusually moody, or have stomach aches.
• Bedwetting in a child who was previously dry at night can be a sign of high blood sugar.

Symptoms in older adults

• Older adults may experience confusion, drowsiness, dizziness, or weakness instead of the classic symptoms.
• They might also have dry mouth, or feel faint when standing up, especially if blood sugar is very high.

Causes

Main causes

• Your body does not use insulin properly, a condition called insulin resistance
• Your body does not make enough insulin, the hormone that helps sugar enter your cells
• Eating large amounts of sugary foods and drinks over time
• Being physically inactive, which makes it harder for your body to handle sugar
• Weight gain, especially around the belly area

Risk factors

• Family history of diabetes
• Being overweight or having obesity
• Being 40 years old or older
• Low physical activity levels
• A diet high in processed foods, sugary drinks, and refined carbohydrates
• High blood pressure or abnormal cholesterol levels
• History of gestational diabetes (diabetes during pregnancy)
• Certain ethnic backgrounds (including South Asian, African Caribbean, and Middle Eastern) have a higher risk

When to see a doctor

See a doctor urgently if:

• If you have symptoms of very high blood sugar, such as confusion, vomiting, or difficulty breathing, call your local emergency number right away.
• If you have been told you have diabetes and your blood sugar remains very high despite following your plan, seek same-day medical advice.

Book a routine appointment if:

• If you are over 40, or have risk factors like being overweight or a family history of diabetes, talk to your healthcare provider about a blood sugar check.
• If you notice any common symptoms like increased thirst or frequent urination that do not go away, make an appointment to see a doctor.

Diagnosis

A healthcare provider diagnoses high blood sugar and related conditions using blood tests. They will ask about your symptoms, family history, and lifestyle before deciding which tests you need.

Tests that may be done

• A fasting blood sugar test: measures your blood sugar after you have not eaten for at least 8 hours
• An HbA1c test: shows your average blood sugar level over the past 2-3 months
• An oral glucose tolerance test: measures your blood sugar before and after drinking a sugary liquid

What to expect at your appointment

If your tests show that your blood sugar is higher than normal but not in the diabetes range, your doctor may call it prediabetes. This is a warning sign, but it also means you have a real chance to prevent type 2 diabetes. Your doctor will talk with you about next steps and a personalised plan.

Treatment

Treatment for high blood sugar focuses on lowering your sugar levels and keeping them in a healthy range. For many people, this starts with lifestyle changes. If that is not enough, your doctor may discuss medication options.

Self-care at home

• Eat balanced meals with vegetables, whole grains, and lean protein
• Limit sugary drinks, sweets, and refined breads or pastas
• Aim for at least 150 minutes of moderate physical activity per week, like brisk walking, unless your doctor advises otherwise
• If you are overweight, aim to lose 5-7% of your starting weight, even a small loss helps
• Monitor your blood sugar at home if your doctor recommends it
• Manage stress with breathing exercises, rest, or hobbies you enjoy

Medical treatments

If lifestyle changes are not enough, your doctor may prescribe medications that help lower blood sugar or help your body use insulin better. Always take any prescribed treatment exactly as your healthcare provider advises. Do not change or stop your medicine without speaking to them first.

When is surgery considered?

For some people with severe obesity and high blood sugar, weight-loss (bariatric) surgery can help improve blood sugar control. This is only considered after other options have not worked and requires a full assessment by a specialist team.

Living with this condition

Living with high blood sugar does not mean giving up all foods or fun. It means learning what works for your body. Regular meals, staying active, and checking in with your healthcare team can make a big difference.

Lifestyle tips

• Build a routine: try to eat meals and snacks at similar times each day
• Make physical activity part of your day, like taking the stairs or short walks after meals
• Stay hydrated with water instead of sugary drinks
• Get enough sleep – poor sleep can affect blood sugar levels
• Carry a snack with you in case you feel unwell
• Keep track of how different foods and activities make you feel

Diet and exercise

Try to fill half your plate with vegetables, a quarter with whole grains, and a quarter with lean protein. Choose water as your main drink. For exercise, aim for at least 30 minutes of moderate activity most days, such as walking, swimming, or cycling. Even small changes, like a 10-minute walk after a meal, can help your body use sugar better.

Mental health and emotional wellbeing

A high blood sugar diagnosis can feel stressful or overwhelming. You might worry about the future or feel frustrated with changes. These feelings are normal. Talk to your healthcare provider or a trusted friend. Managing stress is part of managing blood sugar – your mental health matters.

Prevention

For most people, type 2 diabetes and high blood sugar can be prevented or delayed through healthy lifestyle changes. Even if you have a family history, you can still lower your risk with weight management, healthy eating, and regular physical activity.

Screening programmes

Screening is recommended if you are over 40, overweight, or have other risk factors. Early catching of high blood sugar gives you the best chance to take action. Ask your healthcare provider about routine blood sugar checks.

Complications

If left untreated

• Progression to type 2 diabetes
• Heart disease and stroke
• Kidney damage
• Eye problems, including vision loss
• Nerve damage, especially in feet and hands
• Poor blood circulation and slow-healing injuries

Long-term outlook

There is good news. With early detection and simple lifestyle changes, you can greatly reduce your risk of developing diabetes and its complications. Every healthy choice you make, no matter how small, brings you closer to better health. Your healthcare team is there to help you succeed.

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