Hello Harika and thanks for the query
10-12 pus cells in urine is indicative of urinary track infection. To get rid from it you need to get your urine culture examination done and accordingly an effective antibiotic can be given. In addition to this USG abdomen can also be done if your doctor feels. The cause of infection can be renal stone, Kidney infection
A proper clinical check up and investigation is needed to find out the cause. Meanwhile take plenty of water and take urine alkaliser if you have burning maturation.