Hi sir, This is shiva kumar from hyderabad, i had kidney stones 10 mm in size in left kidney and undergone for surgery URSL, six months past and now again the pain is raising in left kidney, now i took painkiller injection and went for ultrasound scanning, the report shows that PELVICALYCEAL SYSTEM DILATED IN LEFT KIDNEY (HYDRONEPHROSIS), and evidence of 3 CALCULI MEASURING 7.8, 602, 601 MM NOTED IN MID POLE OF RIGHT KIDNEY, today morning again i got severe pain from midnight to morning, is it dangerous what is the problem i had, and how can it cured, is there a chance of kidney failure. please help me sir