Written by Dr. Matthew Capozzi, DPM, FACFAS, CWS (board-certified foot surgeon and wound specialist) · Medically reviewed by the CircuFiber Scientific Advisory Board · Updated: October 28, 2026
Diabetes insipidus is a rare disorder in which the body cannot hold on to water, so the kidneys pass large amounts of pale, dilute urine and you feel extremely thirsty. It is caused by a problem with antidiuretic hormone (ADH), also called vasopressin: either the brain does not make or release enough of it, or the kidneys do not respond to it. Despite the shared name, diabetes insipidus is unrelated to diabetes mellitus (type 1 and type 2 diabetes): blood sugar is normal, and the treatment is different.
Key Takeaways
- Diabetes insipidus is a water-balance disorder, not a blood-sugar disorder. It affects the body's ability to retain water and regulate fluid balance, and it is unrelated to diabetes mellitus.
- The main symptoms are frequent urination of large amounts of pale urine, extreme thirst, and dehydration if fluid is not replaced.
- There are four types: central, nephrogenic, dipsogenic and gestational diabetes insipidus, each with a different cause.
- Diagnosis involves a physical examination, a review of medical history, and tests such as the water deprivation test.
- Treatment depends on the type. Options include medication such as desmopressin, managing fluid intake, and a low-salt, low-protein diet. There is no cure, but most people live otherwise typical lives with proper management.
What is diabetes insipidus?
Diabetes insipidus is a condition in which a hormone signaling problem causes the kidneys to release too much water, marked by an excessive output of pale urine and difficulty retaining water. Your body is like a city, where hormones are its traffic lights. In the case of diabetes insipidus, it's as though these signals have malfunctioned.
The antidiuretic hormone (ADH), created by the hypothalamus and stored inside the pituitary gland, works relentlessly behind the scenes to stabilize your bodily fluids by telling the kidneys to conserve water. When ADH production, release or action is disrupted, diabetes insipidus can develop. Read more from the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) on diabetes insipidus.
Is diabetes insipidus the same as diabetes mellitus?
No. Diabetes insipidus and diabetes mellitus are distinct conditions that share a name only because both can cause frequent urination and thirst. This disorder should not be confused with diabetes mellitus, another condition that can bring on similar outcomes in terms of fluid production. Diabetes mellitus, which includes prediabetes, type 1 and type 2 diabetes, is a metabolic disorder of blood sugar caused by a lack of insulin or the body's resistance to insulin. Diabetes insipidus is a disorder of water balance caused by a problem with antidiuretic hormone.
| Feature | Diabetes insipidus | Diabetes mellitus (type 1 and type 2) |
|---|---|---|
| What goes wrong | Antidiuretic hormone (vasopressin) is too low, or the kidneys do not respond to it | The body does not make enough insulin or does not use it well |
| Blood sugar | Normal | High |
| Urine | Large amounts of pale, dilute urine with no sugar in it | Frequent urination; urine may contain glucose when blood sugar is high |
| How common | Rare | Very common |
| Main tests | Urine and blood tests, water deprivation test | Blood sugar tests such as fasting glucose and A1C (see understanding diabetes tests and diagnosis) |
| Typical treatment | Desmopressin for some types, fluid management, low-salt diet | Diet, exercise, oral medications and/or insulin |
If you are worried about the far more common blood-sugar form of diabetes, see the early signs and symptoms of diabetes.
What are the types of diabetes insipidus?
There are four types of diabetes insipidus: central, nephrogenic, dipsogenic and gestational. Each one breaks the body's water-balance system at a different point.
Central diabetes insipidus
Central diabetes insipidus is caused by an issue in either the hypothalamus or the pituitary gland, which ultimately leads to too little vasopressin. It is comparable to a citywide power outage. Much like when lights are out during a blackout, this condition can come on suddenly due to damage to these glands, for example after brain surgery or a head injury. The result is excessive urine, because the kidneys cannot retain fluids properly without the hormone's signal.
Nephrogenic diabetes insipidus
Nephrogenic diabetes insipidus is caused by the kidneys failing to respond to vasopressin, even though the body makes enough of it. In a city with nephrogenic diabetes insipidus, the traffic lights are operational but they are being disregarded by the drivers, the kidneys. Genetic mutations (congenital nephrogenic diabetes insipidus), certain medications, kidney disease and electrolyte imbalances can be at its origin, leading to an inability to concentrate urine and control water balance.
Dipsogenic diabetes insipidus
Dipsogenic diabetes insipidus is caused by a defect in the thirst mechanism in the hypothalamus, which drives excessive drinking and an unquenchable thirst. It isn't related to ADH production, so treating it effectively is difficult, and there is no way of fixing the traffic lights here. That's why researchers studying dipsogenic diabetes insipidus continue to look for new solutions to help those affected find relief from their constant thirst.
Gestational diabetes insipidus
Gestational diabetes insipidus is an uncommon condition that occurs unexpectedly during pregnancy. It's triggered by the placenta producing too much of an enzyme that destroys antidiuretic hormone (ADH). Fortunately, gestational diabetes insipidus usually passes after childbirth. It is different from gestational diabetes, the blood-sugar condition of pregnancy; read about gestational diabetes symptoms for that.
What are the symptoms of diabetes insipidus?
The main symptoms of diabetes insipidus are frequent urination of large amounts of pale urine and extreme thirst, which can lead to dehydration. The signs of diabetes insipidus are similar to a city stuck in gridlock: profuse urination and dehydration. Because the body cannot store enough water without antidiuretic hormone working properly, people experience very strong thirst and a dry mouth. Common signs include:
- Passing large amounts of pale, dilute urine
- Needing to urinate frequently, including at night
- Extreme thirst and a strong preference for cold water
- Signs of dehydration, such as dizziness, fatigue and dry skin
It is very important that these warning signals do not go ignored. As soon as you notice these symptoms, seek medical care without delay so problems related to severe water loss can be avoided.
What causes diabetes insipidus, and who is at risk?
Diabetes insipidus is caused by too little antidiuretic hormone, kidneys that do not respond to it, a faulty thirst mechanism, or a placental enzyme during pregnancy, depending on the type. Certain factors increase the risk of developing diabetes insipidus, such as:
- A family history of the condition
- Kidney disease
- Certain medications, such as lithium
- Brain surgery or head injury, which raise the chance of central (cranial) diabetes insipidus
Unfortunately, there is no known way to prevent the condition. Seeking medical assistance right away should any symptoms arise can be hugely beneficial.
How is diabetes insipidus diagnosed?
Diabetes insipidus is diagnosed with a physical exam, a review of the patient's medical history, and urine and blood tests, often including a water deprivation test. The water deprivation test is an accurate way to tell whether the condition exists, just like cutting off a city's water supply would show how well its resources manage with less fluid. During this test, which is done under medical supervision, the person does not drink any liquid. If large amounts of dilute urine are still produced despite the restriction, diabetes insipidus is likely. Blood sugar tests are usually done as well to rule out diabetes mellitus.
How is diabetes insipidus treated?
Treatment for diabetes insipidus depends on its type, and common treatments include medication such as desmopressin and changes to daily habits. Just like each city has its own unique approach to handling traffic flow, there is no single treatment for every form.
Desmopressin for central and gestational diabetes insipidus
Desmopressin is a man-made form of antidiuretic hormone used for central and gestational diabetes insipidus. Desmopressin can be viewed as a supervisor that maintains order over congestion when the regular streetlights don't work. Your doctor will decide whether it is right for you and how to take it.
Treatment for nephrogenic and dipsogenic diabetes insipidus
Nephrogenic and dipsogenic diabetes insipidus do not respond well to added hormone, so treatment focuses on the underlying cause, fluid intake and diet. For nephrogenic diabetes insipidus, that can mean changing a medication that triggered it or treating an electrolyte imbalance; talk to your doctor about the options for your type.
How do you manage diabetes insipidus day to day?
Managing diabetes insipidus day to day means controlling fluid intake, monitoring serum sodium levels and taking medication as prescribed. Living with diabetes insipidus can feel like a journey through variable and unpredictable traffic conditions, but with the right strategies, managing this condition becomes more straightforward.
Diet and nutrition
A low-salt, low-protein eating plan can help ease diabetes insipidus symptoms by reducing the amount of urine the kidneys need to make. Incorporating low-salt, low-protein foods into the diet is like improving city infrastructure for smoother movement of vehicles. Adding plenty of watery fruits and vegetables also helps. For general guidance on building balanced meals, see this guide to crafting a diabetic diet plan, and ask your doctor or dietitian before making major changes.
Regular check-ups
Regular check-ups let your doctor track sodium levels, hydration and how well treatment is working. Managing diabetes insipidus isn't effortless, but by following a clear plan, taking regular check-ups seriously and leading a balanced lifestyle, most people can live without major disruption.
What are the complications of diabetes insipidus?
The main complication of diabetes insipidus is dehydration, which can also upset the balance of sodium and other electrolytes in the blood. If diabetes insipidus is not properly managed, it can cause serious difficulties, much like a town without water. Infants, older adults and people who cannot easily recognize or respond to thirst are at greater risk of severe consequences, which in rare cases can be life-threatening. Fortunately, careful management usually results in good outcomes.
When should you see a doctor about diabetes insipidus?
See a doctor if you are urinating large amounts of pale urine, waking up repeatedly at night to urinate, or feeling constantly thirsty despite drinking plenty of water. Seek urgent care for signs of severe dehydration, such as confusion, dizziness or fainting, especially in a baby, a child or an older adult. Because frequent urination and thirst are also signs of type 2 diabetes, your doctor can test for both conditions at the same time.
Frequently asked questions about diabetes insipidus
What is the difference between diabetes insipidus and diabetes mellitus?
Diabetes mellitus is a metabolic disorder of blood sugar caused by a lack of insulin or resistance to insulin, while diabetes insipidus is a disorder of water balance that causes excessive urine output and water loss. Diabetes insipidus is unrelated to the more widespread diabetes mellitus, and blood sugar is normal in diabetes insipidus. To learn more about the blood-sugar condition, read what causes diabetes.
What deficiency causes diabetes insipidus?
Central diabetes insipidus is caused by a deficiency in antidiuretic hormone (ADH), also called vasopressin, which helps maintain hydration by letting the kidneys conserve water. The hypothalamus region of the brain produces ADH. Without enough of it, the kidneys release too much water. Nephrogenic diabetes insipidus is different: ADH levels are normal, but the kidneys do not respond to it.
What is the difference between central and nephrogenic diabetes insipidus?
Central diabetes insipidus starts in the brain, where the hypothalamus or pituitary gland does not make or release enough vasopressin. Nephrogenic diabetes insipidus starts in the kidneys, which do not respond to vasopressin even when there is enough. This difference is why desmopressin works for central diabetes insipidus but usually not for the nephrogenic type.
Can diabetes insipidus be cured?
There is no cure for most forms of diabetes insipidus, but most affected people are able to live otherwise typical lives with proper treatment and management. Gestational diabetes insipidus usually goes away after childbirth, and diabetes insipidus caused by a medication may improve once that medication is changed under a doctor's care.
Does diabetes insipidus affect blood sugar?
No. Diabetes insipidus does not raise blood sugar, and it is not managed with insulin or blood glucose monitoring. If you have high blood sugar along with thirst and frequent urination, that points to diabetes mellitus; see this beginner's guide to type 2 diabetes.
Where can I find clinical trials for diabetes insipidus?
Clinical trials on diabetes insipidus are listed on ClinicalTrials.gov. Researchers continue to study new ways to recognize and control the disease and improve people's quality of life, and your doctor can help you decide whether a study is a good fit.
References, studies and sources
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Diabetes Insipidus. https://www.niddk.nih.gov/health-information/kidney-disease/diabetes-insipidus
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Diabetes. https://www.niddk.nih.gov/health-information/diabetes
- Mayo Clinic. Diabetes: Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/diabetes/symptoms-causes/syc-20371444
- MedlinePlus (U.S. National Library of Medicine). Diabetes. https://medlineplus.gov/diabetes.html
- U.S. National Library of Medicine. ClinicalTrials.gov. https://clinicaltrials.gov/
About the author: Dr. Matthew Capozzi, DPM, FACFAS, CWS, is a board-certified foot surgeon through the American Board of Foot and Ankle Surgery. He is a Diplomate of the American Academy of Wound Management and Fellow of the American College of Foot and Ankle Surgeons. He completed a three-year residency program in Foot and Ankle Reconstructive Surgery at St. Francis Hospital & Medical Center in Hartford, CT in 2010. Dr. Capozzi is a board-certified Wound Specialist® granted by the American Academy of Wound Management.
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