Diabetes insipidus can occur when any part of the system that regulates fluid in your body breaks down. It’s closely associated with low levels of antidiuretic hormone (ADH), also known as vasopressin. ADH levels affect how well your kidneys conserve water.
To understand diabetes insipidus, it helps to understand how your body normally uses and regulates fluids.
Fluids make up around 50 to 60 percent of an adult’s overall body mass and around 75 percent of an infant’s, according to StatPearls.
Maintaining the proper amount of fluid in your body is key to your overall health. Consuming water and food throughout the day helps provide fluid to your body. Urinating, breathing, and sweating help eliminate fluid from your body.
Your body uses a system of organs and hormone signals to regulate body fluids. It makes less urine when you need to replace fluid lost to sweating and makes more urine when there’s too much fluid in your body.
In addition:
The kidneys play an important role in fluid regulation by removing extra fluid from your bloodstream.
The bladder stores the fluid waste until you urinate it out.
The brain produces ADH, which is stored in the pituitary gland after production.
The hypothalamus is the specific area of the brain where ADH is made. The hypothalamus regulates thirst.
When your body needs to retain water, the pituitary gland will release ADH into the bloodstream.
When you need to get rid of water, ADH is either released in smaller amounts or not released at all, and you’ll urinate more often.