Recently, yellow urine may cause: first, urine concentration, such as hot weather, drinking less water or sweating more, or diarrhea, vomiting and other symptoms, can lead to excessive loss of body fluids, there will be urine concentration. Or a long time without urination, urine storage in the bladder for more than 3 hours or more, there will be varying degrees of concentration, there will be yellow urine, usually not accompanied by any symptoms such as urinary frequency, urinary urgency, pain in urination. Second, when there is a urinary tract infection, there can be a deepening of the color of urine, accompanied by frequent urination, urinary urgency, urinary pain, accompanied by cloudy urine, the need for routine urinalysis, further identification. Third, when there is hepatitis or the existence of biliary system diseases, can appear jaundice, blood bilirubin level increases, then through the urine bilirubin discharge will also increase, will be manifested as yellow urine. If urine tests show elevated levels of urinary bilirubin, or if urinary bilirubin is positive, and blood bilirubin tests show elevated levels, treatment is needed to reduce the yellowing.