After eating vitamin B will appear urine color yellow dye this is a normal phenomenon, rather than disease conditions, generally do not need special treatment. Vitamin B after oral absorption, because of its riboflavin part of the original form of the form by the urine out of the body, so it will cause the phenomenon of yellow stained urine. At this time will not be accompanied by any urinary abnormalities, there is no urinary frequency, urgency, pain in urination, lumbago and other symptoms, only manifested in the yellow color of the urine, appropriate drinking more water after the yellow color of the urine phenomenon can be slightly improved. If the course of medication is sufficient, it is recommended to stop the medication in time, and during the period of medication, you need to maintain a daily water intake of more than 1500ml. In addition to vitamin B, there are many other drugs that may cause yellow staining, such as furan antibiotics or sulfonamide antibiotics, yellow staining of urine can occur after oral intake of antibiotics, which are normal drug staining rather than a disease condition, do not need to worry too much.