Diabetic ketoacidosis (DKA) is a serious and potentially life-threatening complication of diabetes. It happens when the body produces dangerously high levels of ketones — chemicals that build up in the blood when the body burns fat for fuel instead of sugar. Understanding this condition can help you act quickly and get the right care before it becomes a medical emergency.
What Is Diabetic Ketoacidosis?
Diabetic ketoacidosis is a form of metabolic acidosis. That means the blood becomes too acidic because of a build-up of substances called ketone bodies — including acetone and closely related chemicals.
Normally, your body uses glucose (sugar) for energy. However, when there is not enough insulin to move glucose into your cells, the body starts breaking down fat instead. This process creates ketones as a byproduct. When ketones build up too quickly, they make the blood dangerously acidic.
This condition is most common in people with Type 1 diabetes. It can also occur in people with Type 2 diabetes, though less frequently. According to Health Canada, diabetes affects millions of Canadians, making awareness of complications like DKA especially important.
What Causes Diabetic Ketoacidosis?
DKA usually develops when insulin levels in the body are too low. Several triggers can cause this to happen. Knowing these triggers can help you reduce your risk.
Missing Insulin or Medication
The most common cause of diabetic ketoacidosis is skipping insulin doses. This is especially dangerous for people with Type 1 diabetes, who depend entirely on insulin injections or a pump. Even one missed dose can set off a chain reaction in the body.
Faulty insulin delivery devices, such as a clogged pump, can also cause DKA without you realizing it. Therefore, always check your equipment regularly and speak with your diabetes care team about backup plans.
Illness or Infection
When your body fights an illness — like the flu, a urinary tract infection, or pneumonia — stress hormones are released. These hormones work against insulin and can cause blood sugar to spike. As a result, your body may not have enough insulin to keep up, even if you are taking your regular dose.
During any illness, Canadians with diabetes are advised to monitor their blood sugar more frequently. Your provincial health plan may cover extra supplies during these periods — check with your pharmacist or family doctor.
Other Common Triggers
A new diabetes diagnosis (DKA can sometimes be the first sign)
Physical or emotional stress
Surgery or serious injury
Certain medications, such as corticosteroids
Alcohol or drug use
Heart attack or stroke
Recognizing the Symptoms of Diabetic Ketoacidosis
Symptoms of diabetic ketoacidosis can develop quickly — sometimes within 24 hours. Knowing what to look for is critical. The earlier you catch DKA, the easier it is to treat.
Early Warning Signs
Early symptoms of DKA are often similar to general diabetes symptoms. They are easy to overlook if you are not paying close attention.
Excessive thirst
Frequent urination
High blood sugar readings
High ketone levels in urine (detectable with home test strips)
More Serious Symptoms
As diabetic ketoacidosis progresses, the symptoms become more severe. These signs mean the situation is becoming urgent.
Nausea and vomiting
Stomach pain
Weakness or fatigue
Shortness of breath
A fruity or sweet smell on the breath (from acetone)
Confusion or difficulty concentrating
Flushed skin
Furthermore, if left untreated, DKA can lead to loss of consciousness and even death. This is a medical emergency that requires immediate attention.
How Is Diabetic Ketoacidosis Diagnosed?
Doctors diagnose diabetic ketoacidosis through a combination of physical examination and lab tests. These tests measure the levels of ketones, blood sugar, and acid in your body.
Tests Used to Diagnose DKA
Your doctor or emergency team will typically order the following:
Blood sugar test: Checks how high your glucose levels are
Blood ketone test: Measures ketones directly in the bloodstream
Arterial blood gas (ABG): Shows how acidic the blood has become
Electrolyte panel: Checks levels of sodium, potassium, and other minerals
Urine test: Looks for ketones and signs of infection
Complete blood count (CBC): Helps identify any underlying infection
In addition, your care team may run tests to find out what triggered the episode. This helps prevent future occurrences. For more information on diabetes testing, visit the Mayo Clinic’s DKA diagnosis guide.
Treatment for Diabetic Ketoacidosis
Diabetic ketoacidosis is treated in a hospital setting, usually in an emergency department. Treatment focuses on three main goals: replacing fluids, restoring insulin levels, and correcting electrolyte imbalances.
Fluids and Rehydration
DKA causes significant dehydration. Intravenous (IV) fluids are given right away to rehydrate the body. This also helps to dilute the excess blood sugar and flush out ketones.
Insulin Therapy
Insulin is given through an IV to stop ketone production and lower blood sugar. Your medical team will monitor your levels closely and adjust the dose as needed. Once blood sugar reaches a safe level, you may switch back to your regular insulin routine.
Electrolyte Replacement
DKA disrupts the balance of electrolytes — minerals like potassium and sodium that your body needs to function properly. These are replaced through an IV drip. This step is critical, as low potassium can cause dangerous heart rhythm problems.
Most people with diabetic ketoacidosis recover fully with prompt treatment. However, repeated episodes can cause lasting damage. Therefore, prevention and ongoing diabetes management are key.
Preventing Diabetic Ketoacidosis
The good news is that diabetic ketoacidosis is largely preventable. With the right habits and support, most people with diabetes can avoid DKA.
Daily Habits That Help
Take your insulin and medications exactly as prescribed
Monitor your blood sugar regularly — more often when you are sick
Use urine or blood ketone test strips when your blood sugar is high
Follow a diabetes-friendly eating plan recommended by your care team
Stay hydrated, especially during illness or hot weather
Know Your “Sick Day” Plan
Every person with diabetes should have a sick day plan prepared with their doctor. This plan explains how to adjust insulin and fluids when you are unwell. Ask your family doctor or diabetes educator to help you create one.
In Canada, many provincial health programmes offer diabetes education centres where you can get personalized support. These services are often covered under provincial health plans. Your family doctor can give you a referral.
For more guidance on managing diabetes and preventing complications, Healthline’s guide to preventing DKA is a useful resource.
When to See a Doctor
If you or someone you know has diabetes and shows signs of diabetic ketoacidosis, do not wait. Call 911 or go to your nearest emergency department immediately if you notice:
Vomiting that prevents you from keeping fluids down
Blood sugar that stays very high despite taking insulin
High ketone levels that are not coming down
Confusion, extreme fatigue, or difficulty breathing
A fruity smell on the breath
For less urgent concerns — such as learning to manage blood sugar better or understanding your risk — visit your family doctor or a walk-in clinic. In Canada, walk-in clinics can provide same-day assessments and refer you to diabetes specialists if needed.
It is always best to speak with a healthcare provider before making changes to your diabetes management plan. Every person’s situation is different, and your doctor knows your full health history.
Frequently Asked Questions About Diabetic Ketoacidosis
What is the difference between diabetic ketoacidosis and hyperglycemia?
Hyperglycemia simply means high blood sugar, which is common in diabetes. Diabetic ketoacidosis is a more serious condition where high blood sugar combines with a dangerous build-up of ketones that makes the blood acidic. DKA requires emergency medical treatment, while mild high blood sugar can often be managed at home.
Can Type 2 diabetics get diabetic ketoacidosis?
Yes, although diabetic ketoacidosis is much more common in people with Type 1 diabetes, it can occur in Type 2 diabetes as well. This is more likely during a serious illness, major surgery, or when the body is under extreme stress. If you have Type 2 diabetes and experience symptoms of DKA, seek medical attention right away.
How quickly does diabetic ketoacidosis develop?
Diabetic ketoacidosis can develop within 24 hours, and sometimes even faster. In people with Type 1 diabetes who miss an insulin dose or experience a sudden illness, DKA can progress rapidly. This is why it is important to monitor your blood sugar and ketone levels closely whenever something changes in your routine.
What does a fruity smell on the breath mean in diabetes?
A fruity or sweet smell on the breath is a warning sign of diabetic ketoacidosis. It is caused by acetone — one of the ketone bodies released when the body burns fat for fuel. If you notice this smell in yourself or someone with diabetes, check blood sugar and ketone levels and seek medical help immediately.
Is diabetic ketoacidosis covered under provincial health plans in Canada?
Yes, emergency treatment for diabetic ketoacidosis in a hospital is covered under all provincial and territorial health plans in Canada. This includes IV fluids, insulin therapy, and lab tests done in hospital. However, coverage for at-home supplies like ketone test strips varies by province, so it is worth checking with your provincial health authority or pharmacist.
Can diabetic ketoacidosis be prevented?
In most cases, diabetic ketoacidosis can be prevented with consistent diabetes management. Taking insulin as prescribed, monitoring blood sugar regularly, and having a sick day plan in place are the most effective strategies. Working closely with your family doctor or a diabetes educator gives you the best chance of avoiding DKA.
Key Takeaways
Diabetic ketoacidosis is a serious complication of diabetes caused by a dangerous build-up of ketones in the blood.
It is most common in Type 1 diabetes but can affect anyone with diabetes.
Common triggers include missed insulin, illness, infection, and physical stress.
Early symptoms include excessive thirst, frequent urination, and high blood sugar. Advanced symptoms include vomiting, confusion, and fruity-smelling breath.
DKA is diagnosed and treated in a hospital with fluids, insulin, and electrolyte replacement.
Most cases are preventable with good daily diabetes management and a clear sick day plan.
If you suspect DKA, call 911 or go to the emergency department immediately. For ongoing diabetes support, speak with your family doctor or visit a walk-in clinic.
This article is for informational purposes only and is not a substitute for professional medical advice. Always consult your doctor or a qualified healthcare provider if you have concerns about your health or diabetes management.
