The treatment of urethral stones depends on the size of the stone. If the stone is very small, it can be expelled from the body through increased physical activity and water consumption; generally, stones less than 0.4cm can be expelled. Larger stones may become lodged in the urethra, causing difficulty urinating or even urine retention. A urethral probe can be used to push the stone into the bladder, where it can then be broken up using surgery or extracorporeal shock wave lithotripsy, and subsequently expelled from the body. If the urethral stone is very close to the urinary opening, it can also be directly removed with hemostatic forceps. Therefore, the dietary considerations for someone with a urethral stone depend primarily on the size and position of the stone, with most requiring repositioning into the bladder or surgery.