Urine routine does not need to hold urine, but each examination needs to retain at least 10 to 15 ml of urine in a test tube. Urine is the waste produced by the excretion of blood after glomerular filtration, reabsorption in the renal tubules and collecting ducts. Urine routine can be used to assist in the diagnosis of urinary system diseases, observation of the condition and efficacy of urinary system diseases, and also to assist in the diagnosis of other systems, screening of the healthy population, and monitoring of the use of medication. Urine specimens can be categorized into morning urine, random urine, timed urine, and special urine. Urine routine examination mostly uses morning urine and random urine. Morning urine is the first urine after waking up, applicable to the formation of components, chemical composition and early pregnancy and other tests; random urine is collected at any time of urine, the collection is convenient, mostly applicable to outpatient, emergency examination. Both do not need to hold urine, just make sure to retain a sufficient amount of specimen can be. Urine routine does not need to hold urine, it is recommended to go to a regular hospital, under the guidance of the doctor, reasonable and standardized examination, if there is any abnormality, timely treatment.