There are several ways to test your condition. A urine test will reveal if your pee is concentrated and yellow or light and diluted. The latter is a sign of diabetes insipidus. However, a blood test may also be recommended. Keep in mind; this process may take several hours as you might have to go without water to test your thirstiness. Throughout the day, your medical provider can measure the amount of sodium in your urine or blood. Another way to diagnose diabetes insipidus is to see if the kidneys respond properly. This can be done with an ADH substitute. Your doctor will examine both the lab tests and the response to the substitute.

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