Causes may include:
Frequent excessive thirst or thirst that can’t be quenched can be symptoms of serious medical conditions, such as:
When you try to quench excessive thirst, it’s possible to drink too much fluid. Taking in more water than you expel is called overhydration. This can occur when you drink too much liquid to compensate for fluid loss. It can also occur if you have disorders in the kidney, liver, or heart.
Overhydration can cause a severely low blood sodium level that could result in confusion and seizures, especially if it develops quickly.
Thirst is the feeling of needing to drink something. It occurs whenever the body is dehydrated for any reason. Any condition that can result in a loss of body water can lead to thirst or excessive thirst. For this reason, thirst is a characteristic symptoms of certain medical conditions, most notably diabetes mellitus. Thirst may be accompanied by other signs of dehydration such as
Dehydration and thirst may be minor or severe, depending upon the amount of water lost by the body. Polydipsia is the medical term that refers to increased or excessive thirst.
To help diagnose the reason for your excessive, unresolved thirst, your doctor will ask you for a complete medical history, including any previously diagnosed conditions. Be prepared to list all of your prescription and over-the-counter medications and supplements.
Some questions your doctor may ask include:
In addition to a physical exam, your doctor may order blood and urine tests to help provide a diagnosis. These tests may include:
Depending on the test results, your doctor may refer you to a specialist.
Measure all fluids carefully in a measuring cup. Record your daily fluid intake each time you drink or eat foods that are liquid at room temperature.