Morning urine generally refers to the urine excreted in the first urine after waking up early and before complete fasting and no exercise, there is no specific time and cannot be generalized. Generally speaking, the time of morning urination for the average person is around 5-6 a.m. The time of morning urination is related to the amount of water drunk before going to bed the night before, if you drink more water, the time of morning urination will be earlier, if you drink less water, the time of morning urination may be delayed. Morning urine is often the best material for routine urine examination because of the concentration of urine as well as precipitation after the night. By retaining mid-morning urine for routine urinalysis, signs of urinary tract pathology such as white blood cell indicators, red blood cell indicators, bacteria, acidity, urine protein, tubular type, urine sugar, etc. can be detected, facilitating screening and diagnosis of disease. If it is necessary to keep morning urine for routine urine examination, it is generally recommended to stop eating and drinking after 24:00 hours the night before to ensure the accuracy of the test results.