high sugar in older adults

Overview

High blood sugar means there is too much glucose, a type of sugar, in the blood. Glucose is the body's main fuel, but it needs to stay balanced. When it runs too high, it is called hyperglycemia. This often happens when the body cannot use insulin well or does not make enough insulin. In older adults, it can be caused by diabetes, illness, stress, certain medicines, or changes in eating habits.

Yes. High blood sugar becomes more common as people age. Diabetes and prediabetes, a condition where blood sugar is higher than normal but not yet diabetes, are both seen often in older adults.

It can affect anyone, but it is more common in older adults, especially those who are overweight, inactive, or have a family history of diabetes. People with high blood pressure or abnormal cholesterol levels are also more likely to have high blood sugar.

Symptoms

Common symptoms

• Feeling very thirsty or having a dry mouth
• Urinating more often, especially at night
• Feeling more tired than usual
• Blurred vision
• Unexplained weight loss
• Slow-healing cuts or sores

Symptoms in children

• This article focuses on older adults. Children with high blood sugar may also have frequent urination, heavy thirst, and changes in energy or behavior. If you are concerned about a child, speak with a pediatrician.

Symptoms in older adults

• Confusion or memory problems that come and go
• Dizziness or feeling faint, which can increase fall risk
• Dry, itchy skin or poor wound healing
• Urinary tract infections or frequent infections
• Unintended weight loss or poor appetite

Causes

Main causes

• Diabetes, where the body does not make enough insulin or cannot use it well
• Stress from illness, infection, surgery, or pain
• Eating large amounts of sugary foods or drinks
• Skipping or not taking diabetes medicines as prescribed
• Some medicines, such as steroid tablets or certain diuretics, can raise blood sugar

Risk factors

• Being 65 years of age or older
• Being overweight or having extra weight around the belly
• Not being physically active
• Family history of type 2 diabetes or high blood sugar
• High blood pressure, high triglycerides, or low HDL, which is often called good cholesterol
• Previous diagnosis of prediabetes or diabetes during pregnancy

When to see a doctor

See a doctor urgently if:

• You have new symptoms such as confusion, dizziness, or extreme thirst.
• Your home blood sugar readings are much higher than your doctor recommended for several days.
• You have signs of an infection, such as a fever, burning when you urinate, or a wound that looks infected.

Book a routine appointment if:

• You have not been checked for diabetes in the past year.
• You have risk factors like overweight, high blood pressure, or a family history of diabetes.
• You need a plan to manage your blood sugar or a review of your current medicines.

Diagnosis

A doctor or nurse can check your blood sugar with a simple blood test. They may ask about your symptoms, medical history, and family history. Some tests are done after you have fasted, which means not eating or drinking anything except water for about 8 hours, and others can be done at any time.

Tests that may be done

• Fasting blood sugar test, which measures blood glucose after an overnight fast
• HbA1c test, which reflects your average blood sugar over the past 2 to 3 months
• Random blood sugar test, which can be done at any time
• Oral glucose tolerance test, which checks how your body handles a sugary drink over a few hours

What to expect at your appointment

The tests are simple and usually done in a clinic or lab. You may need to fast before the test. Your provider will explain the results and what they mean. If your blood sugar is high, they will talk with you about next steps, such as lifestyle changes and any medicines you may need. There is no need to feel embarrassed. This is a common health check for older adults.

Treatment

Treatment focuses on lowering blood sugar to a safe level and preventing complications. For older adults, the main tools are healthy eating, regular physical activity, monitoring blood sugar, and taking medicines exactly as prescribed. The goal is often to avoid low blood sugar and to protect quality of life.

Self-care at home

• Check your blood sugar at home if your care team has shown you how, and write down the readings.
• Take your prescribed medicines at the same time each day, and discuss any concerns with your pharmacist or doctor.
• Keep a source of fast-acting carbohydrates, like juice or candy, only if your doctor has told you to, in case of low blood sugar.
• Wear comfortable shoes and check your feet daily for cuts, blisters, or red spots.
• Drink plenty of water unless directed otherwise by your doctor.
• Ask your doctor before taking any over-the-counter medicines or supplements, as they can affect blood sugar.

Medical treatments

Doctors may prescribe diabetes medicines or insulin to help control blood sugar. The right choice depends on your overall health, other conditions, and personal goals. Your care team will explain how to take each medicine and help you adjust it safely. Some newer medicines are given as injections and are not insulin. Always ask your provider about possible side effects and how to prevent low blood sugar.

When is surgery considered?

Surgery is not a standard treatment for high blood sugar itself. However, if you have complications such as an infected foot wound or a blocked heart vessel, you may need surgical procedures to protect your health. Your care team will discuss all options with you.

Living with this condition

Managing high blood sugar in older age is about creating a simple routine. Eat meals at regular times, be active in ways you enjoy, take your medicines as prescribed, and keep a list of your blood sugar readings to share during appointments. Involve family or carers if you need help with shopping, cooking, or medication.

Lifestyle tips

• Aim for at least 150 minutes of moderate activity each week, such as brisk walking, if your doctor says it is safe.
• Include strength-building activities, like using light weights or doing chair exercises, twice a week.
• Get enough sleep and try to manage stress with breathing exercises, hobbies, or talking with friends.
• Quit smoking and limit alcohol, as both can affect blood sugar and overall health.

Diet and exercise

Work with your healthcare provider or a dietitian to build a meal plan that includes vegetables, whole grains, lean protein, and healthy fats. Try to limit sugary drinks, sweets, and highly processed foods. Regular exercise helps your body use sugar more efficiently. Even short walks after meals can help lower blood sugar.

Mental health and emotional wellbeing

Living with a lifelong condition can feel overwhelming, and high blood sugar can affect mood, memory, and energy. Feeling anxious, frustrated, or down is normal. Talking to your doctor, a counselor, or a trusted friend can help. If you are feeling very low or having thoughts of harming yourself, call your local emergency number immediately.

Prevention

High blood sugar can often be prevented or delayed by healthy habits. Maintaining a healthy weight, staying active, eating balanced meals, and keeping track of your numbers can help. Some risk factors like age and family history cannot be changed, but lifestyle makes a big difference.

Vaccines

Older adults with high blood sugar should stay up to date on recommended vaccines, including flu, pneumonia, and COVID-19 vaccines. Ask your pharmacist or healthcare provider which vaccines are right for you.

Screening programmes

Routine blood sugar checks are recommended for adults with risk factors. If you are 65 or older and have not been tested, ask your provider about a fasting glucose test or an HbA1c test.

Complications

If left untreated

• Damage to blood vessels, increasing the risk of heart attack and stroke
• Kidney disease that may progress quietly over time
• Nerve damage in the feet and hands, causing numbness or pain
• Vision problems, including damage to the back of the eye
• Slower healing and a higher risk of foot ulcers and infections
• Dehydration and confusion, sometimes leading to hospital stays

Long-term outlook

With good care, many older adults with high blood sugar live active, full lives. Treatment works best when it is steady and personal. It is normal to have ups and downs, but most people can keep their blood sugar at safe levels with support from their care team. The earlier you act, the better the results.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.