Urine yellow if not accompanied by any discomfort symptoms is usually normal; if the urine yellow and accompanied by frequent urination, urinary incontinence, urinary urgency or urinary pain and other symptoms is not normal. Urine is excreted by the urinary system, yellow urine often occurs after drinking less water or sweating a lot, due to reduced urine production, urine concentration and yellow urine, by moderately increasing the amount of water can be relieved. In addition, if you take vitamin B2 and other drugs can also show yellow urine, after stopping the drug can return to normal. However, if the yellow urine is accompanied by frequent urination, incomplete urination, urinary urgency or urinary pain and other uncomfortable symptoms, this is not normal, it may be caused by infection of the urinary tract, you need to go to the hospital in time to check the routine urine examination, if necessary, urinary tract ultrasound and other tests, to clarify the cause of the disease. Other causes such as increased bilirubin can also cause yellowing of the urine, if a long time can not be relieved or combined with other symptoms, the patient should consult a doctor in a timely manner to identify the cause and treatment.