Sir Meri Mother In Law Ko Stone Ki Prblm H

Sir meri mother in law ko stone ki prblm h kidney me v pain bi hota h bhut .and sweelling bi h pair me .but there is no pain in the swelling .swelling khatm ni ho ri h dawa leti h to relief milta h but fir vaisi hi ho jati h .urin test kraya to usme 4-6puss cells v acidic reaction nikla h .ar sb nil h other report bi normal h .ex. Hemoglobin tlc dlc thyroid etc.To prblm ni samjh aa ri ki sweelling kyu ni khatm ho ri plese help me.