Diabetic ketoacidosis (DKA) can cause intense thirst, frequent urination, unusual tiredness, nausea, vomiting, and stomach pain. As it worsens, a person may develop deep or fast breathing, fruity-smelling breath, or confusion. DKA is a medical emergency, so do not wait for every symptom to appear. Seek emergency care for breathing problems, fruity breath, repeated vomiting, confusion, or several warning signs together.
What Are the Early Symptoms of Diabetic Ketoacidosis?
Diabetic ketoacidosis develops when the body does not have enough insulin to use blood sugar for energy. The body then breaks down fat, producing acidic substances called ketones. When these substances build up too quickly, they can cause a dangerous change in the blood's chemistry. According to the Centers for Disease Control and Prevention (CDC), unusual thirst and frequent urination are often among the first warning signs. Other symptoms may appear as the condition progresses.
- Increased thirst: A person may feel unusually thirsty or need to drink water much more often than usual.
- Frequent urination: Urination may become more frequent than normal, including during the night.
- Unusual tiredness or weakness: A person may feel exhausted, weak, or less able to carry out everyday activities.
- Nausea and vomiting: The person may feel sick to their stomach or vomit repeatedly.
- Abdominal pain: Pain or discomfort in the stomach area can develop, sometimes alongside nausea and vomiting.
- Dry mouth and skin: The mouth may feel very dry, and the skin may become dry as fluid is lost.
- Headache or muscle aches: Headaches, muscle stiffness, or general body aches may occur.
- Fruity-smelling breath: The breath may develop a sweet or fruity odor associated with ketone buildup.
- Changes in breathing: Breathing may become unusually fast and deep, or a person may feel short of breath.
- Confusion or reduced alertness: In more serious cases, a person may become confused, unusually drowsy, or less responsive.
How Quickly Can DKA Symptoms Develop?
The timing can vary. Early signs, such as increased thirst and urination, may develop before a person feels seriously unwell. Other symptoms can worsen quickly, making it important to recognize changes rather than wait for the full set of warning signs. The Mayo Clinic notes that DKA symptoms often develop quickly, sometimes within 24 hours.
Symptoms such as vomiting, abdominal pain, or tiredness can occur with several illnesses. However, when these symptoms appear alongside unusual thirst, frequent urination, fruity-smelling breath, or changes in breathing, the combination may indicate a medical emergency. Breathing difficulties, confusion, and reduced alertness require particular attention.
Which DKA Symptoms Require Emergency Care?
Diabetic ketoacidosis is potentially life-threatening and needs prompt hospital treatment. Seek emergency medical care immediately if you or someone else experiences any of the following warning signs:
- Fast, deep, or difficult breathing.
- Breath with a fruity smell.
- Repeated vomiting or an inability to keep food or fluids down.
- Confusion, fainting, marked drowsiness, or reduced consciousness.
- Several symptoms of DKA occurring together, particularly when they are getting worse.
- High ketone levels in the blood or urine, especially when accompanied by symptoms.
The CDC advises seeking emergency care if blood sugar remains at 300 mg/dL (16.7 mmol/L) or higher, if breathing becomes difficult, if fruity-smelling breath develops, or if vomiting prevents a person from keeping food or drinks down. Do not wait for a particular blood sugar reading if serious symptoms are present. Call your local emergency number or go to the nearest emergency department.
Can DKA Be the First Sign of Diabetes?
Yes. Diabetic ketoacidosis can occur in someone who has not yet been diagnosed with diabetes. It is most common in people with type 1 diabetes, but people with type 2 diabetes can also develop it. In some cases, the symptoms of DKA are the first noticeable indication that diabetes is present. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) explains that DKA may be the first sign of type 1 diabetes, including in children and young people.
This is important because a previous diabetes diagnosis is not required for DKA to develop. Children, teenagers, and adults may all be affected. New or rapidly worsening symptoms involving thirst, frequent urination, vomiting, abdominal pain, unusual tiredness, or breathing changes should be taken seriously, even when the person has never been told they have diabetes.
How Do Healthcare Professionals Check for DKA?
Symptoms can raise concern for DKA, but healthcare professionals use examination and testing to assess what is happening. They consider the person's medical history, current symptoms, and how quickly the symptoms developed. Tests may include blood glucose measurements, blood or urine ketone testing, and blood tests that assess acidity and the balance of electrolytes, which are minerals needed for normal body function.
According to MedlinePlus, testing for suspected DKA can include blood glucose and ketone measurements, an electrolyte panel, and tests that assess acid-base balance. These results help clinicians establish whether ketoacidosis is present and determine the care needed. When warning signs suggest DKA, testing and assessment should take place urgently rather than waiting for symptoms to resolve.
What Should You Do if You Notice Possible DKA Symptoms?
If you have diabetes and develop symptoms that could indicate DKA, follow your diabetes care team's sick-day or emergency plan. Check blood glucose and ketones according to your care plan if the tests are immediately available, but do not delay emergency treatment to obtain a reading. The CDC recommends that people with diabetes check for ketones when they are ill or when their blood sugar is 250 mg/dL (13.9 mmol/L) or higher.
If you have breathing difficulties, fruity-smelling breath, persistent vomiting, confusion, or multiple warning signs, seek emergency care immediately. Do not try to manage suspected DKA at home or wait until every possible symptom appears. Prompt medical assessment is essential because DKA can progress to severe dehydration, loss of consciousness, and other life-threatening complications when treatment is delayed.