Male urine yellow, then the possible causes are as follows: first, urine concentration caused by the urine, usually seen in the morning after the urine color is yellow, more water after the urine color can become clear, often with a long time without urination, less water, more sweating, more evaporation of body fluids and other factors. This condition is a physiological change, not caused by disease, and does not require any treatment, only the need to maintain a certain amount of water to drink. Second, when suffering from jaundice, yellow urine can appear, except for yellow urine, but also accompanied by yellow staining of the skin and mucous membranes of the whole body, when the blood bilirubin level test can be found high bilirubin level; urine routine examination, can see urinary bilirubin, urobilinogen and other elevated, often seen in hepatocellular jaundice or obstructive jaundice and other diseases, need to protect the liver, anti-yellowing and other comprehensive treatment. Third, due to drugs or food staining, such as oral administration of a large number of antibiotics, sulfonamide antibiotics, B vitamins, riboflavin and other drugs, can cause yellow staining of the urine, after stopping the use of related drugs, the urine color can return to normal.