Normally, the main analysis of whether a routine urine examination requires fasting is as follows: 1. Fasting is required: if conditions allow, it is best to be able to check urine routine on an empty stomach. Because the urine routine check on an empty stomach, urine can fully stay in the bladder and stay long enough, that is, the first urine in the morning, can reflect the initial, most primitive state of the body, for common kidney diseases, the urine routine at this time has the greatest possibility of exposing the disease. The first morning urine routine, that is, the fasting urine routine is the most accurate. 2, can not fasting: conditions do not allow, or the patient because of an emergency, can not wait until the next day’s fasting, the daytime urine routine also has significance, such as patients with sudden hematuria, do daytime urine routine also has important significance, this urine routine is called random urine routine. Given the urgency of the patient’s condition, a urine routine that needs to be retained immediately, there may be a risk of missing the diagnosis of disease exposure for some specific patients because of factors such as drinking and urination during the day, resulting in a relatively short time for the urine to remain in the bladder. Therefore, if the disease cannot wait, a random urine routine is recommended. If conditions permit, it is recommended that a morning urine routine, that is, a fasting urine routine, is the best and most standard.