Urine routine all normal urine bubbles, may be urine concentration, hold urine time too long, urination distance is far away and other factors lead to. 1. Concentration of urine: drinking too little water for a long time leads to the concentration of urine, the content of other substances in the urine increases, water decreases in the urination will make the urine bubbles, is a normal performance, increase the amount of drinking water, can be restored to normal. 2. hold urine for too long: long time to hold urine, too much urine in the bladder, in the discharge of the impact of the larger, it is easy to produce foam, foam will soon disappear. 3. Urination distance is far away: for example, when men urinate, due to the urination position is higher, the distance is far away, urine in the impact of the water surface, it is easy to produce tension blisters, and thus appear foam. Urine foam for a long time, urine routine examination appeared abnormal, may be the existence of disease factors, it is recommended to seek medical examination and treatment.