Across Her Knee 4 Year Old - Sudden Knee Pain - Today I Felt Her Knee Pop Then The Pain Stopped. Wondering What Could Cause?

4 year old - sudden knee pain - today I felt her knee pop then the pain stopped. Wondering what could cause? - across her knee

My daughter is 4 It began with a sudden extreme pain in his knee in his right knee 2 months. This happens when the leg bends. When this happens, you can not correct because she says it hurts. The last time no more than 2 minutes. Today, when it came, I put my hand on his knee and waited to see what happened. I felt a pop for a minute. When he arrived, he could move the knee. I am a doctor, and she was scheduled for x-rays. The problem is that it may take several weeks before they can take, because we are moving in the state. I am looking for some suggestions for me to do some online research. I searched all day, but found nothing that corresponds to the symptoms of the child.
She is not overweight, Has been in good health, but they said their feet a little bit of face to face. I do not know if this is connected to it ...... a website or suggestions on what might be?