Dear Sir, Last time when checked my Urine, RBC was 4-5,  & 4-5 pus cells in one lab othr lab 5-8 pus cells& i have taken Ultra sound stone, but there was no stone present. But doctor told me.there might tiny stone which is not visible during ultra sound. He has prescribed me cystone for 15 days. After one month i checked by urine , randome urinr. Found that 1-2 rbc. No other sysmyoms prsent Is some thing to worry Thanks