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From Fellrnr.com, Running tips
→Symptoms and Possible Meanings
* '''Thirst and Urination.''' If you are thirsty, but everything you drink creates urine without quenching your thirst, you may be low on electrolytes.
* '''Swollen Hands.''' The most likely cause is lack of electrolytes, but can also be triggered by re-hydration following prolonged dehydration. (There are other possible causes outside of hydration.)
* '''Skin Turgor.''' When you pinch the skin on the back of your hand and release, it should spring back into shape. If it moves back slowly, you may be dehydrated. If it 'tents', then you may be badly dehydrated.* '''Salt Stains.''' These salt stains on clothing, or a salty crust on the skin are sometimes considered a sign of 'salty sweating'. I do not believe this is the case, but rather an indication that conditions are producing a lot of sweat, but the sweat is evaporating and leaving the salt behind. Cooler conditions produce less sweat, and warmer/humid conditions cause the sweat to roll off, taking the salt with it.
==Weight Drop from Dehydration==
