THIRST EXCESSIVE
Excessive thirst is an abnormal feeling of always needing to drink fluids. Drinking lots of water is usually healthy. However, the urge to drink too much beyond a certain limit may be the result of an underlying disease, either physical or emotional. Excessive thirst may be a symptom of high blood sugar (hyperglycemia), and can be an important clue in detecting diabetes.
Excessive thirst is a fairly common symptom. It is often the reaction to fluid loss during exercise, or to eating salty foods.
Source: National Library of Medicine, Medline Plus. 2008
