What causes dark brown urine in the morning after sleeping?
1. Introduction and Direct Answer Dark brown urine in the morning is most frequently the result of severe overnight dehydration, which concentrates the urochrome pigment, or the presence of old blood originating from the upper urinary tract. Other significant medical causes include rhabdomyolysis releasing myoglobin, hepatic conditions elevating serum bilirubin, or certain medications and dietary … Read more