Diabetic Ketoacidosis (DKA): Signs of a Sugar Emergency

Infographic on Diabetic Ketoacidosis (DKA) with a person checking blood sugar.

Medically reviewed by the ER of Irving Clinical Team · Updated:

September 29, 2026

At its core, DKA is a “fuel crisis.” Your body’s cells need glucose (sugar) for energy, and insulin acts like a key that lets that sugar into the cells. According to the CDC, when your body doesn’t have enough insulin, sugar stays in your blood, and your cells begin to starve.

To compensate, your body starts breaking down fat at a rapid rate. This produces acids called ketones. When ketones build up too quickly, they can be toxic by making your blood acidic. While DKA is most common in people with Type 1 diabetes, MedlinePlus notes it can also affect those with Type 2 diabetes under certain conditions, such as severe illness or infection.

Why Your Body Produces Ketones

Think of ketones as an emergency backup generator. They are fine in small amounts, but when the “generator” runs too hot for too long, the exhaust (acid) becomes dangerous. High ketones can be an early sign of DKA, which is a medical emergency.

Recognizing the Red Flags: DKA Symptoms

Four DKA red flags: fruity smelling breath, being very thirsty, frequent urination, and confusion or mental fatigue

DKA is serious and can be life-threatening. Recognizing DKA symptoms early can help you avoid an emergency.

Identifying “Fruity” Breath

One sign of DKA is a “fruity” odor on the breath. MedlinePlus says a fruity odor to the breath is a sign of ketoacidosis. If your breath smells fruity, the CDC says to go to the emergency room or call 911 right away.

Extreme Thirst and Frequent Urination

Early symptoms of DKA include:

  • Polydipsia: Being very thirsty.
  • Polyuria: Frequent trips to the bathroom.
    MedlinePlus lists dehydration among the common symptoms of DKA.

Confusion and Mental Fatigue

You may feel “foggy,” confused, or unusually tired. MedlinePlus lists confusion and feeling very tired or sleepy among the severe symptoms of ketoacidosis. If you have severe symptoms, seek immediate medical help.

Early Warning Signs vs. Emergency Signs

The CDC says DKA usually develops slowly. If it is not treated, more severe symptoms can appear quickly. Monitoring these changes can help you intervene before the situation becomes critical.

StageCommon Symptoms
Early WarningHigh blood sugar (250 mg/dL or above), extreme thirst, and frequent urination.
More SevereFast, deep breathing, dry mouth, “fruity” smelling breath, nausea, vomiting, stomach pain, and being very tired.
Emergency (Call 911)Trouble breathing, vomiting and not keeping food or drinks down, or blood sugar that stays at 300 mg/dL or above.

If you have a home ketone testing kit, the CDC recommends checking your urine for ketones if you are sick or your blood sugar is 250 mg/dL or above.

When to Head to the Emergency Room

Four signs of diabetic ketoacidosis that need the emergency room: vomiting and not keeping food or drinks down, high ketones, blood sugar that stays at 300 mg/dL or above, and trouble breathing

You should never “wait and see” if you suspect DKA. The CDC says to call 911 or go to the emergency room right away if you have any of these signs:

  1. Inability to keep food or drinks down: If you are vomiting and cannot keep food or drinks down.
  2. High Ketones: If a home test shows high ketones.
  3. Blood Sugar Stays High: If your blood sugar stays at 300 mg/dL or above.
  4. Trouble Breathing: If you are having trouble breathing.

How the ER Stabilizes Blood Sugar

The three pillars of DKA treatment in the emergency room: fluid replacement, electrolyte replacement, and insulin therapy

Walking into an ER with DKA can be overwhelming, but the medical team has a very specific, evidence-based protocol to get you back to health. According to MedlinePlus, treatment typically involves three main pillars:

1. Fluid Replacement

You will receive fluids, often through an IV, to replace fluids lost through frequent urination. This also helps dilute the excess sugar in your blood.

2. Electrolyte Replacement

Too little insulin can lower your electrolytes, the minerals in your body such as sodium and potassium. Doctors will check and replace them.

3. Insulin Therapy

You will receive insulin to correct the high blood sugar level. Insulin helps your cells use sugar again and reverses the conditions that cause DKA.

Common Causes and Risk Factors

Why does DKA happen? Understanding the triggers can help you prevent a recurrence.

  • Infection or Illness: The CDC names illness as one of the two most common causes. You may not eat or drink as much as usual, which can make blood sugar hard to manage.
  • Missing Insulin Doses: Missing insulin shots, a clogged insulin pump, or the wrong insulin dose is the other most common cause.
  • New Diagnosis: Sometimes, DKA is the first sign that a person has Type 1 diabetes.
  • Heart Attack or Physical Trauma: A heart attack, a stroke, or a physical injury, such as from a car accident, can also cause DKA.

Prevention: Staying Ahead of a Crisis

Living with diabetes requires vigilance, but you can take steps to help prevent DKA.

  • Check Often: Monitor your blood sugar often, especially when you are sick.
  • Have a “Sick Day Plan”: Talk to your doctor about adjusting your insulin when you have a cold or an infection.
  • Keep Ketone Strips Handy: Always have an unexpired box of ketone testing strips in your medicine cabinet.

Don’t Wait: Get Immediate Care for Diabetic Ketoacidosis

If you or a loved one shows signs of DKA, such as fruity breath, vomiting, or rapid breathing, do not wait. Call 911 or get emergency DKA care at ER of Irving right away.

Call us now at (972) 893-3148 for immediate assistance or to speak with a healthcare professional.

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FAQs

Can Type 2 diabetics get DKA?

Yes. While more common in Type 1, people with Type 2 can also develop DKA, especially during a severe illness or infection.

How long does it take to recover from DKA?

With treatment, most people respond within 24 hours. Sometimes, it takes longer to recover.

Can I treat DKA at home?

No. DKA is a medical emergency. If you have DKA, you will be treated in the emergency room or admitted to the hospital.

Why am I breathing so fast during DKA?

This is called Kussmaul breathing. DKA makes your blood acidic. Your body tries to make up for it by breathing out carbon dioxide at a higher rate.

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