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Dark yellow urine
typically suggest that your not drinking enoughwater in a day.How much water have you drank for the day? You should be drinking 8 to 10 glasses of water a day. If you do not drink enough water, then your urine becomes over-concentrated with waste, which is why it is a darker yellow urine color. You may also notice a stronger odor since the concentration is higher.
if your drinking more than enought water in a day and still condition is same than it may b the reason for some illness,go for urine test.
blood in the urine(haematuria),haemolytic anemia
,hepatitis(inflammation of liver
) may also cause dark orange yellow urine.