Causes of Thirst

Simple causes of thirst include:

  • Normal. It could simply be normal thirstiness.
  • Dehydration
  • Heat exposure
  • Exercise or exertion
  • Reduced fluid intake
  • Fever. Many causes of fever will cause a mildly or moderately increased thirst.

Note that dehydration is a potentially dangerous condition, especially for infants, the elderly, and other at-risk groups.

Diabetic Disorders: Thirst is a classic symptom of undiagnosed diabetes, but usually also with the symptom of excessive urination (polyuria). There are many types of diabetes that can cause an abnormal thirst:

Thirst Disorders: Other causes of abnormal thirst include:

Note that some of these disorders result in thirst because they cause dehydration, such as by excessive urination of fluids. Take care to watch for dehydration, which is a dangerous condition.

Mental Health Disorders: Psychologic disorders that may cause abnormal thirst include:

Dehydrating Disorders: Other causes of abnormal thirst (often via dehydration) include:

Similar Symptoms: See also the causes of related symptoms:

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Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.