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Adipsia, also known as hypodipsia, is a symptom of inappropriately decreased or absent feelings of thirst. [1] [2] It involves an increased osmolality or concentration of solute in the urine, which stimulates secretion of antidiuretic hormone (ADH) from the hypothalamus to the kidneys. This causes the person to retain water and ultimately ...
This occurs when these over-concentrated solutions sit in the gut and draw water from the rest of the body, and the reduced fluids in the body's tissues then have a higher proportion of salt to fluid. Children with serum sodium greater 150 mmol/liter have thirst out of proportion to other signs of dehydration.
“Thirst can be mistaken for hunger pangs,” says Balls. “Dehydration symptoms include headache, fatigue, lightheadedness and difficulty concentrating, all of which resemble hunger symptoms.”
Doctors used to recommend that patients drink at least 8 cups a day...but not anymore. Over drinking water can actually kill you.
While in people over age 50, the body's thirst sensation diminishes with age, a study found that there was no difference in fluid intake between young and old people. [10] Many older people have symptoms of dehydration, with the most common being fatigue. [11]
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Discontinuation of hydration does not produce true thirst, although a sensation of dryness of the mouth often is reported as "thirst". The evidence that true thirst does not occur is extensive, [ citation needed ] along with evidence showing that the ill feeling is not relieved by giving fluids intravenously, but rather by wetting the tongue ...