Carragher's clash with Flanagan left him requiring several minutes of lengthy treatment before he was carried from the field.
He laughed with liverpoolfc.tv: "I feel a bit better now!
"At the time it was a bit of a whack and I was knocked out, but I feel okay now and will hopefully be okay for the weekend.
"It was just one of them things. John's enthusiastic, eager and keen and that's why he will go for every ball. It's exactly the way I was, and probably still am now which is why I went for it (the ball).
"It's part of the game. I'm sure I've whacked a few people over the course of my career!"