Why is the urine that pull very yellow

Show pull urine is very yellow, this needs to go to the hospital first to do a urine routine examination, because urine continues to yellow consider this may be hepatobiliary disease, do urine routine examination can find urine urobilin, bilirubin is increased. If urobilin, bilirubin increased, suspected hepatobiliary disease, need to do further hepatobiliary system B ultrasound examination, and liver function examination, to clarify the cause. If caused by hepatobiliary disease, need to give treatment for the cause. If after urine routine examination, no abnormality is found, then the urine pulled is very yellow, considering that this is physiological, there may be too little water urine concentration, or it is related to diet or oral administration of certain drugs, after drinking more water, improving diet, stopping treatment, urine yellow will soon improve.