There's something in my leg

So we had a big breakthrough a few nights back concerning potty training. It was about 9pm and I heard Aidyn banging around upstairs. I went up to put her back to bed when I found her on her potty chair. She had, all by herself, removed her pajamas and her pull-up and was sitting on the potty. After we both shared a mini victory Aidyn started absent-mindedly feeling her leg when all of the sudden,
"Daddy! Dhere's somefing in my leg!"
"What?"
"Look I got somefing in my leg. Look!"

Then I noticed she was touching her ankle bone on the inside of her left foot. Well.....yes. Technically that is something that is in your leg.