Everyone should have had this experience ~ hands have something to stop, is busy can not go, bed not remember, do long-distance car on the highway …….. But suddenly want to pee, this time people will coincidentally produce a behavior – hold urine. However, people have three emergencies are not solved, there will be harm to knock on the door, a long time to hold urine you may be unable to urinate, incomplete urination or even painful urination phenomenon, a serious point may also appear urinary tract infection, damage kidney function, and even induce cardiovascular disease. Hold urine for a long time, there is always a vague feeling of bladder explosion, but the bladder is really as fragile as you think? And in what circumstances will it blow up?