The normal color of urine is yellowish, and there are many reasons for the appearance of yellow urine, mainly the following factors: 1, there may be female patients with liver and gallbladder lesions, such as suffering from obstructive jaundice or jaundice hepatitis, such diseases will cause a large amount of urobilinogen and urinary bilirubin to be excreted through the urine, resulting in the appearance of yellow urine. 2, there may also be female patients with urethritis and other urinary tract infections. The urine may also become very yellow in terms of diet or medication, such as oral B vitamins and other conditions.