what causes decreased urine output
Dehydration. Dehydration is the most common cause of decreased urine output. Typically, dehydration occurs when you are ill with diarrhea, fever, or another sickness and cannot replace the fluids that you are losing and your kidneys retain as much fluid as possible.any things can cause oliguria, or a decreased urine output. These range from temporary conditions to more serious illnesses. Dehydration is the most common cause of decreased urine output.