high sugar when to seek care

Overview

High blood sugar, also called hyperglycemia, means there is too much sugar in your blood. Sugar (glucose) is the main fuel for your body, but when your blood sugar runs too high, it can make you feel unwell and, over time, affect your health. This often happens when your body does not make enough of the hormone that controls blood sugar or cannot use it properly.

Yes, high blood sugar is common, especially among people with diabetes. It affects millions of adults and children worldwide.

It can affect anyone, but it occurs most often in people with type 1 or type 2 diabetes. It can also happen during pregnancy, with certain medicines, or when the body is fighting illness.

Symptoms

Common symptoms

• Feeling very thirsty
• Urinating more often than usual
• Feeling tired and weak
• Blurred vision
• Headache
• Dry skin and mouth

Symptoms in children

• The same symptoms as adults, such as thirst and frequent urination
• Bed-wetting in a child who was previously dry at night
• Unexplained weight loss
• Stomach pain or nausea
• Fruity-smelling breath (a sign of high acids in the blood)

Symptoms in older adults

• Feeling more sleepy or confused than usual
• Dry mouth and eyes
• Less hunger or not drinking enough, which can cause dehydration
• Dizziness when standing up
• Frequent urination, which can be mistaken for age-related changes

Causes

Main causes

• Your body not making enough of the hormone that controls blood sugar
• Your body not using that hormone well
• Eating more carbohydrates than your body can handle
• Stress, illness, or infection
• Forgetting or missing your diabetes medicine, or taking a dose that does not match your needs

Risk factors

• Having type 1 or type 2 diabetes
• Living with excess weight or obesity
• Not being physically active
• Having a family history of diabetes
• Being over 45 years old
• Taking certain medicines, such as steroids, that can raise blood sugar

When to see a doctor

See a doctor urgently if:

• If your blood sugar stays very high for more than a few hours
• If you have symptoms like frequent vomiting, fever, or severe diarrhea
• If you notice a fruity smell on your breath or feel very drowsy

Book a routine appointment if:

• At least once or twice a year for a diabetes check-up if you have diabetes
• Sooner if you notice new symptoms like blurred vision, extreme thirst, or unusual tiredness
• If you are over 45 or have risk factors, ask about routine blood sugar screening

Diagnosis

A healthcare provider will take a small blood sample to check your sugar level. They may ask you to fast (not eat or drink) before the test, and they may also order a test that shows your average blood sugar over the past two to three months.

Tests that may be done

• Fasting blood glucose test — blood sugar measured after not eating for at least 8 hours
• Hemoglobin A1c test — shows your average blood sugar over the last two to three months
• Oral glucose tolerance test — blood sugar measured before and after drinking a sugary drink

What to expect at your appointment

The test is simple and only takes a few minutes. A nurse or lab technician will draw blood from your arm. After that, you can usually go home. Your provider will explain your results and next steps.

Treatment

Treatment for high blood sugar focuses on bringing your level down to a safer range and keeping it there. Your plan will depend on the cause, how high your sugar is, and whether you have diabetes. Most of the time, your healthcare team will guide you in making changes to your eating, activity, and medicine.

Self-care at home

• Drink water regularly to help your body flush out extra sugar
• Move your body as your doctor advises — even a short walk helps
• Eat smaller meals and choose fewer sugary foods and drinks
• Check your blood sugar if you have a monitor, and write down the numbers
• Follow any sick-day instructions your healthcare team gave you

Medical treatments

If lifestyle changes are not enough, your provider may prescribe medicine to lower blood sugar. There are several types, including pills and injectable medicines. For very high blood sugar with signs of dehydration or confusion, you may need fluids and medicines given through a vein at the hospital. Your provider will choose the safest option for you.

When is surgery considered?

Surgery is not a first-line treatment for high blood sugar. For some people who live with severe obesity-related diabetes, weight-loss surgery may help improve blood sugar control, but it is only considered after other options have not worked. Your healthcare team will discuss all benefits and risks with you.

Living with this condition

Living with high blood sugar means paying attention to how you feel and making small choices every day. Check your sugar if you have a monitor, take your medicines exactly as directed, and keep regular appointments with your healthcare team.

Lifestyle tips

• Set a routine for meals, activity, and sleep
• Carry water and a healthy snack with you
• Wear a medical ID that says you have diabetes
• Tell family and friends what to do if you feel very unwell

Diet and exercise

Eating a balanced diet with whole grains, vegetables, lean proteins, and healthy fats helps keep blood sugar steady. Moving your body most days — even a 10-minute walk after a meal — helps your muscles use sugar for energy and brings your level down.

Mental health and emotional wellbeing

Managing a long-term condition can take a toll on your emotions. It is normal to feel stressed, anxious, or frustrated. Talk to your healthcare team about how you feel. They can connect you with counselling or support groups. If you ever have thoughts of harming yourself, call your local emergency number or a crisis line right away.

Prevention

Type 2 diabetes can often be prevented or delayed with healthy eating, regular activity, and staying at a healthy weight. Type 1 diabetes cannot be prevented, but starting treatment early can protect your health.

Vaccines

Keep your vaccinations up to date, including flu and pneumonia vaccines. Vaccines help prevent infections that can make blood sugar levels rise.

Screening programmes

If you are over 45 or have risk factors like high blood pressure or a family history of diabetes, a simple blood test can show your risk. Ask your provider if you should be screened.

Complications

If left untreated

• Damage to the small blood vessels in your eyes, which can cause vision problems
• Kidney damage, sometimes leading to the need for dialysis
• Nerve damage, especially in the feet and legs, which can cause pain or loss of feeling
• Increased risk of heart attack and stroke
• A sudden, dangerous condition called diabetic ketoacidosis, especially in people with type 1 diabetes

Long-term outlook

With good care and regular check-ins with your healthcare team, most people with high blood sugar can stay healthy and active for many years. Small steps each day can prevent serious problems and help you feel your best.

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