The cornerback sustained the injury during a punt return against the Detroit Lions at the weekend, forcing him to miss the second half of the game.
The 23-year-old told the team's website: "It was coming in to half time, so right after that, we went right in.
"I tried to get it rubbed down and tried to get some tighter compression shorts to put on, went back out in the second half on that first drive and tried to play on it.
"It was still grabbing at me a little bit, so it wouldn't make no sense to try to stay out there and damage it more."
The Cowboys face the Minnesota Vikings on Sunday.