Hello Doctor I Was Having Mild Pain Occasionally In My

hello doctor
i was having mild pain occasionally in my stomach which i thought is due to the stitches of C section delivery. i consulted a gynae and she advised me to get a ultrasound done.the report says that i have mild pc seperation in my right kidney.what does that mean?in suggestion it is advised a x-ray kUB and urine R/M.please guide