For a routine urine test, you can drink water in the morning. Because urine is constantly being formed and excreted, doing a 24-hour random urine test represents the true condition of the human urinary system. Drinking water may dilute the urine, but it will not cause too serious an error in the results. Only for certain tests, the urine test requires a temporary absence of water. For example, in the morning after waking up to do urine antacid bacillus test, this situation is not recommended to drink water, because after drinking water will soon urinate, generally the morning urine test antacid bacillus has the highest positive rate. Normally, you can drink water for ordinary routine urine tests.