Reduced urine output or dark urine.

排尿减少或者赤尿。

youdao

Her initial symptoms were suspicious-loss of appetite , general fatigue, and dark urine.

她最初的症状很值得怀疑：食欲减退、周身乏力、尿色加深。

youdao

A serious, often fatal complication of chronic malaria, characterized by the passage of bloody, dark red or black urine.

一种严重，常为致命的慢性疟疾并发症，其症状为尿带血、呈深红或黑色。

youdao

The new label will tell patients who experience fatigue, loss of appetite, dark urine, upper stomach pain or jaundice to notify their doctor immediately.

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"Symptoms include flu-like symptoms like tiredness, general aches and pains, headaches and fever, as well as loss of appetite, nausea or vomiting, diarrhoea, abdominal pains, jaundice, very dark urine and itchy skin, " he said.

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Signs of dehydration include fatigue, flushed skin, heat intolerance, light-headedness and dark colored urine.

FORBES: Death from Dehydration