Bladder stone 9mm adult women have the possibility to discharge, while children and male patients usually can not be discharged. Because the female urethra is very short, only 2.5-5 centimeters long, the average is 3.5 centimeters, the diameter of about 8 millimeters, easy to dilate, up to 10-13 millimeters, there is no curved, the female urethra is short and straight, so it is possible to discharge itself by drinking more water. The male urethra is long and curved, about 16-22 centimeters long. The average diameter of the tube is 5-7mm, so a 9mm bladder stone is very difficult for men to expel naturally. It is even more difficult for the elderly and children, who often have an enlarged prostate and have little chance of passing a stone naturally, and for children, who have a smaller diameter urethra and have little chance of passing a 9mm stone naturally. If you find bladder stones, you need to be under the guidance of a specialized doctor to rationalize and standardize the treatment, not to choose their own methods to avoid delays in the condition.