Urinary bilirubin 1+ indicates a slight elevation of urinary bilirubin, which is not necessarily a sign of disease, or may indicate minor liver cell damage, but usually not a serious disease. Bilirubin is excreted into the intestine through the bile duct, and under the action of intestinal bacteria, fecal bilirubin is produced, most of which is excreted in the stool, while a small portion is absorbed into the bloodstream by the intestine and finally excreted in the urine through the kidneys, which is called urobilinogen. If the recent rest is not enough, stay up late for a long time, drink less water, or take certain drugs affecting liver metabolism may lead to changes in urine pH, may find urobilinogen 1+, after rest as well as diet structure adjustment, can be self-relieved, and is not a serious lesion. If the liver cells are damaged, the ability to take up and bind bilirubin decreases and the amount of bound bilirubin in the blood increases, the reabsorption of urobilinogen from the intestine will increase and a test result of urobilinogen 1+ will also occur. This usually indicates that the symptoms of liver damage are mild, not a serious manifestation of the disease, and can be corrected with prompt treatment. If urobilinogen is positive or shows an increase in the plus sign you need to consider hemolytic jaundice or severe liver cell damage and need to seek prompt medical attention.