My daughter, 13 year old, had fever with pain in right side of pelvic area two days back. USG done and the report states-heavy right overy and PID. This year she got fever four times ,even twice in this month. However fever lasted for one days only this time and her period got delayed this month and when period started one days back, the pain is reduced .She was referred to gynaecologist. Now my question is, can USG alone decide PID? What test should be done further to prove it conclusively? What's the treatment? How PID occurs to a novice school goer?