See below: Most common cause of decreased urine production/output is decreased fluid intake. Your kidney can regulate the loss of water from urine by putting out less urine but containing the same amount of waste. This is done quite efficiently. If anyone develops kidney disease the urine output can also drop, despite you drinking adequate water. Seek medical advice as soon as possible.
Answered 9/30/2015
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Drinking less, sweat: Most common cause is low volume intake. Could also be increased loss from sweating or or insensible loss from heat or exertion. Significant fluid loss is associated with rapid breathing. Unlikely 2B due to kidney disease unless U have obvious fluid retention causing swollen ankles or puffiness around your eyes.
Answered 11/4/2014
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