Diabetic Ketoacidosis Symptoms, Signs & Treatments

Most people think of diabetes as something you manage day by day with medication, healthy meals, and regular checkups. But diabetic ketoacidosis (DKA) can turn an ordinary day into a medical emergency in just a few hours. Knowing what to watch for can help you recognize DKA and get emergency care before it becomes life-threatening.

In this article, we’ll explain:

• What diabetic ketoacidosis is: A serious diabetes complication where the body burns fat for fuel and acids called ketones build up in the blood.
• Earlyketoacidosis symptoms: Extreme thirst, frequent urination, nausea, and feeling unusually tired are often the first signs.
• Warning signs that DKA is getting worse: Fruity-smelling breath, vomiting, stomach pain, fast or deep breathing, and confusion.
• What causes DKA: Missed insulin doses, illness or infection, and undiagnosed type 1 diabetes are common triggers.
• When to go to the ER for DKA: Any vomiting, trouble breathing, or confusion in someone with diabetes needs emergency care right away.
• How DKA is treated: ER teams use IV fluids, insulin, and electrolytes to rehydrate the body and bring blood chemistry back to a safe level.

If you or someone you love has diabetes and something feels off, trust your instincts and get checked right away. Our freestanding ER locations in Texas and Colorado are staffed and equipped to treat serious, life-threatening emergencies with the same imaging and lab capabilities as a hospital ER. Our team can quickly test your blood sugar and ketone levels and start treatment right away, so you can get back to feeling like yourself.

What is diabetic ketoacidosis?

Diabetic ketoacidosis (DKA) is a serious diabetic emergency that happens when your body doesn’t have enough insulin to use sugar for energy. To make up for it, your body starts breaking down fat for fuel. This process releases acids called ketones, which build up in your blood and make it dangerously acidic.

Here’s a simple way to picture it. Insulin works like a key that unlocks your cells so sugar can get inside and be used for energy. Without enough insulin, the sugar stays locked out and builds up in your bloodstream. Your cells are essentially starving, even though there’s plenty of fuel available.

Two problems happen at the same time:

1. Acid builds up: As your body burns fat, ketones pile up faster than your body can clear them.
2. You lose fluids: High blood sugar makes your kidneys flush out extra sugar through your urine, and it takes a lot of water with it. This can quickly lead to serious dehydration.

DKA is most common in people with type 1 diabetes, but it can also happen with type 2 diabetes. In some cases, DKA is the very first sign that someone has diabetes at all, especially in children and young adults.

What are the first signs of ketoacidosis?

The first signs of ketoacidosis are usually extreme thirst, peeing much more often than normal, and feeling unusually tired or weak. Many people also notice their blood sugar readings are higher than usual. These early signs can show up hours before you start to feel truly sick.

Early signs to watch for include:

• Intense thirst: Feeling like you can’t drink enough water, no matter how much you have.
• Frequent urination: Needing to pee often, including waking up at night to go.
• Dry mouth and skin: A sign your body is already losing too much fluid.
• Tiredness or weakness: Feeling drained without a clear reason.
• High blood sugar readings: Numbers that stay high even after you take your usual insulin.
• Nausea or loss of appetite: An upset stomach that feels like it could be the start of a virus.

One helpful tip: If you have diabetes, keep ketone test strips at home. The American Diabetes Association recommends checking for ketones when your blood sugar is over 240 mg/dL or when you’re sick. Urine strips are inexpensive, and some blood glucose meters can test ketones from a finger stick. A ketone test can tell you something your blood sugar reading alone can’t.

It’s also important to know that DKA doesn’t always come with very high blood sugar. Some diabetes medications called SGLT2 inhibitors can cause a type of DKA where blood sugar looks normal or only slightly high. These medications include empagliflozin (Jardiance), dapagliflozin (Farxiga), and canagliflozin (Invokana). If you take one of them and feel sick, check your ketones even if your blood sugar seems fine.

To learn more, read our article onwhat a diabetic emergency looks like

How fast does DKA progress? Warning signs it’s getting worse.

DKA can develop in as little as 24 hours, and sometimes even faster. People who use insulin pumps are at special risk, because a blocked tube or failed pump can stop insulin delivery completely. When that happens, DKA can set in within just a few hours.

Signs that DKA is getting worse include:

• Vomiting: Especially if you can’t keep fluids down for more than a few hours.
• Stomach pain: This can be severe enough to feel like appendicitis or another stomach problem.
• Fruity-smelling breath: Ketones can give your breath a sweet smell, a bit like nail polish remover.
• Fast or deep breathing: Your body breathes harder to get rid of extra acid. This can look like long, heavy breaths.
• Flushed face: Skin that looks red or feels warm.
• Headache or muscle aches: Often from dehydration and changes in your body’s chemistry.
• Confusion or extreme sleepiness: Trouble thinking clearly, staying awake, or answering simple questions.

Because diabetic DKA symptoms can look a lot like the stomach flu, many people wait too long to get help. If you have diabetes and you’re vomiting, assume it could be DKA until a ketone test or a doctor says otherwise.

What causes DKA?

DKA is caused by a shortage of insulin, often combined with something that makes your body need more insulin than usual. Illness, infection, and missed insulin doses are the most common triggers. Stress on the body releases hormones that push blood sugar up and make insulin work less effectively.

What causes DKA in type 1 diabetes

In type 1 diabetes, the body makes little or no insulin on its own. That means any gap in insulin can lead to DKA quickly. People with type 1 diabetes depend completely on the insulin they take.

The most common causes of DKA in type 1 diabetes are:

• Undiagnosed diabetes: Many children and young adults first learn they have type 1 diabetes when they arrive at the ER with DKA.
• Missed doses: This can happen during busy schedules, travel, or the teen years, when managing diabetes can feel overwhelming.
• Pump failures: Pumps deliver only fast-acting insulin, so there’s no long-acting backup in the body if the pump stops.
• Being sick: Even a mild cold or stomach bug can raise insulin needs. Many people make the mistake of skipping insulin when they can’t eat, but your body still needs it.

What causes DKA in type 2 diabetes

DKA is less common in type 2 diabetes because the body still makes some insulin. However, it can still happen, and it may be easier to miss because people don’t expect it. Severe illness and certain medications are the most common causes.

Causes of DKA in type 2 diabetes include:

• Serious illness or infection: A major infection or a heart attack can overwhelm the body’s insulin supply.
• SGLT2 inhibitor medications: These can cause DKA with blood sugar levels that don’t look alarming.
• Ketosis-prone diabetes: Some people with type 2 diabetes are more likely to develop DKA, sometimes as their first sign of diabetes.
• Heavy alcohol use or long fasting: Both can push the body to burn fat and produce ketones.

People with type 2 diabetes are also at risk for a related emergency called hyperosmolar hyperglycemic state (HHS). HHS causes extremely high blood sugar and severe dehydration, often without many ketones. It needs emergency care just as urgently as DKA.

When should you go to the ER for DKA?

You should go to the emergency room for DKA if you have diabetes and you’re vomiting, have moderate or high ketones, or your blood sugar stays high and won’t come down with your usual insulin. Trouble breathing, fruity breath, and confusion are also signs you need care right away. DKA cannot be safely treated at home.

Go to the ER if you notice:

• Moderate or large ketones: On a urine strip or a blood ketone test.
• Blood sugar that stays high: Readings that stay above 300 mg/dL even after correction doses.
• Vomiting or diarrhea: Especially if you can’t keep fluids down.
• Stomach pain: Along with high blood sugar or ketones.
• Fast, deep, or difficult breathing: Or breath that smells fruity.
• Confusion or extreme drowsiness: Trouble staying awake or thinking clearly.

Call 911 right away for anyone with diabetes who is very confused, can’t stay awake, or has experienced a loss of consciousness. People with diabetes are also at higher risk for stroke. Sudden numbness or tingling, especially on one side of the body, along with trouble speaking or a drooping face, should never be ignored.

What to do while you wait for care

While you wait for help or get ready to head to the ER, a few simple steps can make a real difference:

• Don’t drive yourself: Have someone else take you or call 911 if symptoms are severe.
• Check blood sugar and ketones if you can: These numbers help the care team start treatment faster.
• Give sugar only if blood sugar may be low: If the person is awake and able to swallow, and you can’t tell whether their sugar is high or low, a small amount of juice or regular soda is the safer choice. Low blood sugar is more immediately dangerous.
• Never give food or drink to someone who isn’t fully alert: They could choke.
• Bring their medications: Include insulin, pump details, and a list of diabetes medications, especially SGLT2 inhibitors.
• Note the timeline: When symptoms started and the last time insulin was taken.

Read more abouthow to treat a diabetic emergency

How is DKA treated?

Diabetic ketoacidosis treatment focuses on three things: replacing lost fluids, giving insulin to stop ketone production, and restoring balanced electrolytes like potassium. Treatment is given through an IV so the care team can control it closely. Most people start feeling better within a day or two once treatment begins.

Here’s what to expect when you arrive at the ER:

• Blood tests: The care team checks your blood sugar, ketones, blood acid levels, and electrolytes. These tests are repeated often, sometimes every one to two hours.
• IV fluids: Fluids are usually the first step. They rehydrate your body and help bring blood sugar down.
• IV insulin: A steady drip of insulin stops your body from burning fat and helps clear ketones.
• Electrolyte replacement: Insulin pushes potassium into your cells, which can make blood levels drop too low. Your care team monitors and replaces potassium carefully.
• Treating the trigger: If an infection or another illness caused the DKA, it gets treated too. This might include antibiotics or imaging tests.
• Switching back to your usual insulin: Once your blood chemistry is back to normal and you can eat, you transition back to injected or pump insulin.

DKA complications can include dangerously low potassium, which can affect heart rhythm, low blood sugar during treatment, and, rarely, brain swelling, which is more common in children. Without fast treatment, DKA can lead to coma and death.

FAQs

At what sugar level do you go into DKA?

DKA usually happens when blood sugar rises above 200 mg/dL, and ketones are present in the blood or urine. However, there’s no single number that guarantees DKA. Some people, especially those taking SGLT2 inhibitor medications, can develop DKA with blood sugar in a normal or only slightly high range.

Can you die from diabetic ketoacidosis?

Yes, DKA can be fatal if it isn’t treated quickly. The good news is that with fast emergency care, the vast majority of people recover fully. The risk is highest for older adults, people with other serious illnesses, and anyone who waits too long to get help.

What does ketoacidosis pee look like?

In the early stages, urine is often pale and plentiful because high blood sugar makes you pee much more than usual. As dehydration sets in, it may turn darker and more concentrated, and some people notice a sweet or fruity smell. You can’t see ketones in your urine, so a ketone test strip is the only reliable way to check at home.

What can be mistaken for diabetic ketoacidosis?

DKA is often mistaken for the stomach flu or food poisoning because nausea, vomiting, and stomach pain are so common. Its fast breathing can look like a panic attack, and confusion with fruity breath is sometimes mistaken for being drunk. Other conditions that can look similar include appendicitis, pancreatitis, and alcohol-related ketoacidosis, which is why blood tests are needed to know for sure.

How can you prevent DKA when you’re sick?

Never stop taking your insulin when you’re sick, even if you can’t eat, because illness often raises your body’s insulin needs. Check your blood sugar every three to four hours, test for ketones, and sip water or sugar-free fluids to stay hydrated. If your ketones rise or you can’t keep fluids down, it’s time to go to the ER.

When diabetes becomes an emergency, Complete Care is ready.

DKA can go from mild thirst and an upset stomach to a life-threatening emergency in a matter of hours. If you or someone you love has diabetes and notices ketoacidosis symptoms like vomiting, fruity breath, fast breathing, or confusion, don’t wait to see if they pass. Getting care early is the best way to avoid serious complications and get back to feeling like yourself sooner.

A freestanding ER like Complete Care is staffed and equipped to treat serious, life-threatening emergencies such as chest pain, severe allergic reactions, and major injuries with the same imaging and lab capabilities as a hospital ER. Our team can quickly test your blood sugar, ketones, and electrolytes and start the treatment your body needs. 

Visit your nearest Complete Care in Austin, Corpus Christi, Dallas/Fort Worth, East Texas, Lubbock, San Antonio, or Colorado Springs when you need care you can trust.

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