Though I have in my life experienced gout, bladder stones, a botched bone marrow biopsy and various other screamable insults, until recently, I had no idea what pain was.

尽管我一生中经历过风、膀胱结石、骨髓活检失败和其他各种令人尖辱，但直到最近，我还不道疼是什么。

The pain is caused by the dilation, stretching, and spasm caused by obstruction of the ureter, and is typically worse at the ureteropelvic junction and down the ureter, and subsides once the stone gets to the bladder.

疼尿管扩张、牵拉、痉挛而起，通常结石位于肾盂尿管交界处和尿管下方时疼更为剧烈，一旦结石落入膀胱症状就消失了。