diabetes on one side

Overview

Diabetes is a long-term condition that affects how your body turns food into energy. Normally, your pancreas makes a hormone called insulin that helps sugar (glucose) from food get into your cells to be used as fuel. In diabetes, your body either doesn't make enough insulin, can't use it well, or both. This causes sugar to build up in your blood. Because blood travels to every part of your body, diabetes affects your entire body — not just one side. If you've noticed symptoms like tingling, pain, or weakness on one side only, that may be a sign of a diabetes complication (like nerve damage), but the diabetes itself is whole-body.

Yes, diabetes is very common. Type 2 diabetes is the most common form, and its numbers have been rising worldwide. It affects hundreds of millions of people globally.

Diabetes can affect people of any age. Type 1 diabetes is often diagnosed in children and young adults. Type 2 diabetes is more common in adults over 40, but it can also appear in younger people, especially with certain risk factors such as overweight, family history, or an inactive lifestyle.

Symptoms

Common symptoms

• Feeling very thirsty and drinking a lot
• Passing urine more often, especially at night
• Feeling more tired than usual
• Blurred eyesight
• Cuts and bruises that are slow to heal
• Tingling or numbness in the hands or feet

Symptoms in children

• Wetting the bed after being dry at night
• Drinking a lot and still feeling thirsty
• Losing weight without trying
• Feeling extremely tired or irritable
• Fruity-smelling breath (a sign of very high blood sugar)

Symptoms in older adults

• Confusion or memory problems
• Feeling weak or unsteady, which can lead to falls
• Frequent urine infections or bladder issues
• Dry, itchy skin or slow healing sores
• Loss of appetite or unexpected weight loss

Causes

Main causes

• Type 1 diabetes: the body's immune system mistakenly attacks the cells in the pancreas that make insulin. The exact cause is unknown, but genes and viral infections may play a role.
• Type 2 diabetes: the body becomes resistant to insulin, or the pancreas stops making enough insulin. Extra body weight and physical inactivity are common contributing factors.
• Gestational diabetes: happens during pregnancy when the body cannot handle the extra strain on blood sugar control. It usually goes away after the baby is born, but it raises your future risk of type 2 diabetes.

Risk factors

• Having a family history of diabetes
• Being overweight, especially around the belly
• Being physically active less than three times per week
• Being over the age of 40 (for type 2)
• Being of certain ethnic backgrounds (e.g., South Asian, African-Caribbean, Middle Eastern — your local health service can tell you more)
• Having high blood pressure or high cholesterol
• Having had gestational diabetes, or giving birth to a large baby (over 4 kg / 9 lb)

When to see a doctor

See a doctor urgently if:

• If you have symptoms like new weakness or drooping on one side of your body, call your local emergency number right away.
• If you have sudden vision changes, chest pain, or vomiting with high blood sugar, seek urgent care today.

Book a routine appointment if:

• See your healthcare provider for a simple blood test if you have any common symptoms of diabetes.
• If you have risk factors such as family history, overweight, or high blood pressure, ask about screening even if you feel well.
• If you are pregnant, routine screening for diabetes is part of good prenatal care.

Diagnosis

Diabetes is diagnosed through blood tests that measure how much sugar is in your blood. The main test is called HbA1c, which shows your average blood sugar over the past 8–12 weeks. Your healthcare provider may also check a fasting blood sugar level (after not eating overnight) or do an oral glucose tolerance test.

Tests that may be done

• HbA1c blood test — no fasting needed
• Fasting plasma glucose test — after at least 8 hours without food
• Oral glucose tolerance test — you drink a sugary drink, and your blood sugar is measured at intervals
• Urine test for sugar or ketones (sometimes during diagnosis)

What to expect at your appointment

A diabetes diagnosis is done in a healthcare setting, not at home. A nurse will take a small sample of blood from your arm, and you may need to fast beforehand. You'll get results within a few days or weeks. If the result is high, your doctor will talk with you about creating a plan — no one will rush you into decisions, and you will have time to ask questions.

Treatment

Treatment for diabetes is about keeping your blood sugar as close to a healthy target as possible. A typical plan includes healthy eating, regular physical activity, checking your blood sugar at home (if advised), and possibly medication. Some people need a daily injection of insulin; others use tablets. Your healthcare team will tailor the plan to your type of diabetes, your lifestyle, and your general health.

Self-care at home

• Check your blood sugar with a meter if your doctor recommends it, and keep a log of the numbers.
• Take any prescribed medication exactly as your healthcare provider tells you — do not stop without their advice.
• Have regular check-ups for your blood sugar, blood pressure, kidney health, eye exam, and foot exam.
• Take good care of your feet: check them daily for cuts, blisters, or redness, especially if you have numbness.
• Know the signs of low and high blood sugar and keep a quick-sugar source handy (like fruit juice or glucose tablets — ask your pharmacist what is right for you).

Medical treatments

Medical treatment for diabetes focuses on lifestyle counseling plus medication to lower blood sugar. This may include tablets that help your body use insulin better or release more insulin, or insulin injections. The exact choice of medication depends on your body's needs and your medical team's guidance. Never switch or start medications without talking to a qualified healthcare provider. For people with type 2 diabetes, weight-loss surgery (bariatric surgery) can sometimes improve blood sugar control, but it is only considered in specific situations.

When is surgery considered?

Surgery is not a standard treatment for diabetes itself. However, some people with type 2 diabetes and severe obesity may be offered weight-loss (bariatric) surgery to help improve blood sugar control. It is reserved for people who meet certain criteria and is decided on a case-by-case basis with a specialist team.

Living with this condition

Living with diabetes means making diabetes care a small part of your routine, not your whole life. You'll learn to balance food, activity, and medication, and to check in with your body. Over time, most people develop a rhythm: test, eat, move, read your body's signals, and carry on with what matters to you.

Lifestyle tips

• Move your body regularly — aim for at least 150 minutes a week of moderate activity like walking, swimming, or cycling.
• Find physical activities you enjoy, do them with someone else, and start slowly if you've been inactive.
• Eat a balanced diet with plenty of vegetables, whole grains, lean proteins, and healthy fats, and limit sugary drinks.
• Manage stress with relaxing hobbies, mindfulness, or talking to someone you trust.
• Get enough sleep — poor sleep can affect blood sugar control.

Diet and exercise

There is no one-size-fits-all 'diabetes diet,' but the general principle is to choose foods that keep your blood sugar steady. Focus on fiber-rich foods like vegetables, beans, and whole grains, and pair carbohydrates with protein or fat to slow down absorption. Regular exercise helps your body use insulin better. A dietitian can help you create an eating plan that fits your culture, preferences, and budget.

Mental health and emotional wellbeing

Being told you have diabetes can feel overwhelming and sometimes sad or angry. It's normal to have these feelings. Some people feel burned out by the constant daily decisions. If you notice that diabetes worries are getting in the way of eating well, sleeping, or enjoying life, please talk to your healthcare team. They can refer you to a counselor or mental health professional. If you ever have thoughts of harming yourself, reach out to a crisis line right away.

Prevention

Type 1 diabetes cannot be prevented at this time, but it can be well managed. Type 2 diabetes can often be prevented or delayed by lifestyle changes: keeping a healthy weight, eating well, being physically active, and not smoking. If you already have type 2 diabetes, these habits can still help you manage it and even reduce the need for medications.

Vaccines

People with diabetes should make sure their vaccinations are up to date, including the flu, pneumococcal (pneumonia), and COVID-19 vaccines, because diabetes can make it harder to fight off infections. Talk to your healthcare provider about which vaccines are recommended for you.

Screening programmes

Routine screening for diabetes is recommended for adults over 40, and at a younger age for those with risk factors like obesity, family history, or high blood pressure. Pregnant women are screened for gestational diabetes. If you have risk factors and haven't been tested, ask your healthcare provider about a simple blood test.

Complications

If left untreated

• Nerve damage (neuropathy) — which can cause tingling, numbness, or pain in the hands and feet, and sometimes on one side of the body.
• Kidney damage (nephropathy) — which can lead to kidney failure over time.
• Eye damage (retinopathy) — which can cause vision loss.
• Heart and blood vessel disease — increased risk of heart attack, stroke, and poor circulation.
• Foot problems — slow healing and infections can lead to ulcers, and in severe cases, amputation.

Long-term outlook

The word 'complications' can sound frightening, but there is a very hopeful message: with good blood sugar control, regular check-ups, and a healthy lifestyle, most people with diabetes never develop serious complications. Many people with diabetes live to a very old age. The key is to start now — look after your numbers, take medications as prescribed, and keep in touch with your healthcare team. Every small step counts, and you have the power to change the course ahead.

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