Urine does not have to be morning urine, according to the examination program to decide, urine routine need morning urine, sudden illness generally do not need. 1. Urine routine examination: it is generally recommended to retain morning urine, drinking less water at night, the urine is in a concentrated state, morning urine examination is more likely to find problems, such as protein, red blood cells, white blood cells in the urine. During the day, a lot of water, there will be dilution, sensitivity will be poor, so choose the morning urine is better. 2. Sudden symptoms of disease: such as sudden urinary tract infections, hematuria, etc., at this time the urine test does not necessarily require morning urine, found discomfort, go to the hospital in a timely manner to improve the urine test, can be clear whether there is infection and whether the infection is serious, the need for further medication. In summary, urination does not necessarily require morning urine.