Kidney stones 0.3cm can be treated by drinking more water, medication, and extracorporeal shock wave lithotripsy from time to time. Kidney stones 0.3cm generally do not cause pain, but if the lining of the kidneys to produce stimulation, or in the ureter, the ureter lining to produce stimulation, is also can cause more intense pain. Stones caused by pain, need to do ultrasound to clarify the location of the stone, you can intramuscular injection of progesterone to dilate the ureter, to promote urination, while drinking more water, more jumping exercise, can promote the stone out of the body. If the stones are still not discharged, extracorporeal shock wave lithotripsy can be performed to promote the discharge of stones. Daily should eat a light diet, drink more water, maintain good exercise habits, quit smoking and drinking, regular work and rest, avoid staying up late.