Positive urobilinogen is mainly due to problems with the liver or biliary system, resulting in the discharge of large amounts of urobilinogen. The most common causes are obstructive jaundice and acute jaundice hepatitis. For patients with positive urobilinogen, it is recommended that you should have liver function tests, liver and biliary ultrasound, and marker tests for hepatitis A, B, and C to confirm whether there are liver function abnormalities, manifested as elevated glutamate transaminase, glutamic oxalacetic transaminase, total bilirubin, and direct bilirubin. It should also be determined whether there is liver enlargement on ultrasound and whether there are abnormal hepatitis markers, which is the most common way to confirm the diagnosis of increased urobilinogen.