Stinging pain in urination of kidney stones may be caused by the stones discharged into the urethra, it is recommended to drink plenty of water and urinate more often to effectively flush out the stones. Generally, the stones that can be discharged into the urethra are not too big, and drinking a lot of water to flush the stones out is the simplest and most effective way. Ultrasound of the kidneys, ureters, bladder and urethra is recommended to effectively determine the size of the stones. If the stones are large, cystoscopic lithotripsy and stone removal can be considered. If the stones are small, they need to be flushed out by urinating more.