Eating vitamin B yellow urine may be a normal phenomenon, because B vitamins contain riboflavin, riboflavin can not be absorbed through the body, it will be excreted through the kidneys, resulting in yellow urine, this situation will be improved by drinking more water, more urination. If the above symptoms are not improved by drinking more water and urinating more, the following possibilities should be considered: 1) abnormal liver function or biliary tract disease, which can cause yellow urine; 2) E. coli infection can also lead to yellow urine. Therefore, it is best for the patient to go for a routine urine test to exclude the possibility of other diseases.