Hello There. I can understand your concern. you have a stone at the vesicle-uretric junction which is 6mm. 6mm is quite big only. you need to be drinking lots of water. also, this needs to be addressed urgently as its causing hydronephrosis and hydroureter . kindly consult the doctor who prescribed this test to you or a general surgeon or a urologist in person with regards to this. Best regards, Dr. Anil kumar jain.