Have You Checked Your Blood Sugar Lately

Overview

Blood sugar (also called glucose) is the main sugar in your blood. It comes from food and drink and is your body's main fuel. A hormone called insulin helps glucose move from your blood into your cells. If your body does not make enough insulin or does not use it well, blood sugar can rise. Over time, high blood sugar can lead to prediabetes or diabetes. Checking your blood sugar can find problems early, when they are easier to manage. This article cannot tell you whether you have diabetes. Always speak to a qualified healthcare provider about your symptoms or test results.

Yes. Diabetes is one of the most common long-term conditions worldwide. Many people have prediabetes or type 2 diabetes without knowing it. That is why regular checks matter.

Anyone can develop high blood sugar. Type 2 diabetes is more common in adults over 40, people with a family history, people carrying extra weight around the middle, and some ethnic groups. Type 1 diabetes often starts in children and young adults. Gestational diabetes happens during pregnancy.

Symptoms

Common symptoms

• Often no symptoms at all
• Feeling very thirsty
• Peeing more often, especially at night
• Feeling tired or lacking energy
• Blurred vision
• Cuts or sores healing slowly
• Unexplained weight loss (more common in type 1 diabetes)
• Tingling, numbness, or pain in hands or feet
• Repeated infections, such as thrush or urinary infections

Symptoms in children

• Being very thirsty
• Peeing more often, including bedwetting in a child who was dry
• Losing weight without trying
• Feeling very tired or sleepy
• Tummy pain, feeling sick, or vomiting
• Mood changes or trouble concentrating
• In babies, heavy wet nappies and feeding problems

Symptoms in older adults

• Confusion or memory problems
• Feeling very tired or weak
• Dry mouth and dehydration
• Frequent infections
• Falls or problems with mobility
• Symptoms may be mistaken for normal ageing

Causes

Main causes

• The body becomes resistant to insulin (insulin resistance), so glucose stays in the blood
• The pancreas cannot make enough insulin
• Type 1 diabetes: the immune system attacks insulin-making cells
• Type 2 diabetes: a mix of insulin resistance and not enough insulin
• Gestational diabetes: hormones during pregnancy make insulin work less well
• Other causes: some medicines (such as steroids), stress, infections, and rare hormone conditions

Risk factors

• Family history of diabetes
• Carrying extra weight, especially around the waist
• Being physically inactive
• Age over 40 (or over 25 in some ethnic groups with higher risk)
• South Asian, African, Caribbean, Hispanic, or Indigenous background (risk varies by population)
• Gestational diabetes or giving birth to a baby over 4 kg (9 lb)
• Polycystic ovary syndrome (PCOS)
• High blood pressure or high cholesterol
• Smoking
• Some medicines, such as steroids
• Sleep problems, like sleep apnoea

When to see a doctor

See a doctor urgently if:

• You have emergency symptoms listed above
• Blood sugar is very high and you feel unwell
• You have vomiting, dehydration, or confusion
• You have a wound or infection that is getting worse quickly

Book a routine appointment if:

• You have risk factors for diabetes
• You notice symptoms like thirst, frequent peeing, or tiredness
• You are over 40 and have not had a blood sugar check recently
• You are pregnant and have not been screened for gestational diabetes
• You have a condition linked to diabetes, such as high blood pressure or PCOS

Diagnosis

Your doctor will ask about your symptoms, health history, and family history. They may examine you and arrange a blood test. Blood tests can show your current blood sugar and your average blood sugar over the past few months. If a test is high, it is usually repeated to confirm.

Tests that may be done

• Fasting blood glucose test (after not eating for 8 to 12 hours)
• HbA1c test (shows average blood sugar over 2 to 3 months)
• Random blood glucose test (any time of day)
• Oral glucose tolerance test (drink a sugary drink and have blood tests over 2 hours)
• Urine test for ketones or sugar (if you are unwell)
• Blood pressure, cholesterol, kidney, and eye checks as part of a full review

What to expect at your appointment

A blood sugar test is quick and usually done with a small needle. You may feel a brief pinch. Results may come the same day or within a few days. If your result is borderline, your doctor may suggest a repeat test or a yearly check. They will explain what the numbers mean for you.

Treatment

Treatment depends on what is causing your high blood sugar and how high it is. The goal is to keep blood sugar in a healthy range and lower your risk of long-term problems. Many people start with lifestyle changes. Some need medicine. Your care team will make a plan with you.

Self-care at home

• Eat regular meals with plenty of vegetables, whole grains, and lean protein
• Choose water instead of sugary drinks
• Move more. Aim for at least 150 minutes of activity a week, in whatever way suits you
• If you carry extra weight, losing a small amount (about 5 to 7% of your body weight) can make a big difference
• Get enough sleep and manage stress
• Check your feet daily if you have diabetes
• Do not smoke. Ask for help to stop
• Keep regular appointments for blood tests, eye checks, and foot checks

Medical treatments

Your doctor may suggest medicine to lower blood sugar if lifestyle changes are not enough. For type 1 diabetes, treatment with insulin is essential because the body cannot make it. For type 2 diabetes, treatment may include tablets or injectable medicines, and sometimes insulin. Your care team will choose what is safe for you and review it regularly. They will also help manage blood pressure and cholesterol, which matter for heart health.

When is surgery considered?

Surgery is not a treatment for high blood sugar itself. Some people with type 2 diabetes and severe obesity may be offered weight-loss surgery as part of a wider plan. This is a big decision and is only considered after discussion with a specialist.

Living with this condition

Living with high blood sugar or diabetes means building routines that fit your life. You may need to check your blood sugar at home, take medicine, and attend regular check-ups. It can feel like a lot at first. Your care team can teach you how to manage day to day.

Lifestyle tips

• Plan meals and snacks to keep energy steady
• Carry a snack if you take medicine that can cause low blood sugar
• Wear comfortable shoes and check your feet
• Keep a record of your readings if you monitor at home
• Have a sick-day plan. Ask your team what to do when you are ill
• Build activity into your day, like walking after meals

Diet and exercise

There is no single 'diabetes diet'. A healthy pattern is one you can keep: more vegetables and fibre, less sugar and processed food, and regular physical activity. Exercise helps your body use insulin better. Start where you are and build up slowly. A dietitian or diabetes educator can help you make a plan that works for your culture, budget, and tastes.

Mental health and emotional wellbeing

High blood sugar and diabetes can affect your mood. You may feel worried, frustrated, or tired of managing it. These feelings are common and deserve attention. Tell your doctor if you feel low, anxious, or overwhelmed. If you ever feel hopeless or in crisis, contact your local emergency number or a crisis support service in your country right away.

Prevention

Type 2 diabetes can often be prevented or delayed. The best evidence is for lifestyle changes: losing a small amount of weight if needed, eating well, and being active. These changes work for people with prediabetes and for many people at risk. Type 1 diabetes cannot currently be prevented.

Vaccines

People with diabetes may be advised to have routine vaccinations, such as flu and pneumonia vaccines. Ask your doctor or pharmacist which vaccines are right for you.

Screening programmes

Many health systems offer regular blood sugar checks for people at higher risk. In the UK, for example, the NHS Health Check includes a diabetes risk assessment for adults aged 40 to 74. Ask your doctor whether you should be screened and how often.

Complications

If left untreated

• Heart disease and stroke
• Kidney damage (diabetic kidney disease)
• Nerve damage, leading to tingling, pain, or foot problems
• Eye problems, including retinopathy, which can affect vision
• Foot ulcers and infections
• Sexual problems
• Gum disease
• Increased risk of infections

Long-term outlook

Finding high blood sugar early gives you the best chance to protect your health. Many people with prediabetes reverse it. With modern care, people with diabetes can live long, full lives. Regular checks and a plan you can stick with make a real difference.

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