dehydration symptoms and passing out
The signs and symptoms of dehydration range from minor to severe. 1  Increased thirst. 2  Dry mouth. 3  Weakness. Dizziness.  Palpitations (feeling that the heart is jumping or 1  pounding) Confusion.  Sluggishness, even 1  fainting. Inability to 2  sweat. Decreased urination, darker urine colour may indicate dehydration.
Dehydration in adults. Dehydration happens when more fluid is lost by the body than is replaced by drinking liquids. The risk of dehydration increases in hot weather and because of severe vomiting or diarrhoea. Symptoms of dehydration can range from mild to life threatening.