Excessive Thirst & Urination in Adults: Causes & When to See a Doctor

Excessive thirst (polydipsia) is generally defined as drinking more than 3 liters (about 13 cups) of fluids per day.

Excessive urination (polyuria) is generally defined as producing more than 3 liters of urine per day.

However, it's important to note that what is considered excessive can vary from person to person, and it's always best to talk to a doctor if you have concerns about your thirst or urination patterns.

Some conditions that can cause excessive thirst and urination include:

* Diabetes insipidus

* Diabetes mellitus

* Kidney disease

* Liver disease

* Certain medications

* Dehydration

* Hyperthyroidism

* Cushing's syndrome

* Addison's disease

* SIADH (syndrome of inappropriate antidiuretic hormone secretion)