Allen was seen with a walking boot on his left leg after the game, but downplayed the ailment.
"I finished the game on it, so I don't think it's going to be a big deal," Allen said, via News 8's AJ Feldman.
NFL Network Insider Ian Rapoport reported the following morning that Allen is believed to have a mild case of turf toe.
Allen did admit his left foot was pretty sore, but it hardly appeared to limit him during the game.
He rallied the Bills back from a 24-3 deficit to force overtime. Allen finished the game with 308 yards passing and two touchdowns, along with a team-high 109 yards rushing and a touchdown.
"There was no way I was going out," Allen said of the injury.
The Bills return home to face the Carolina Panthers in Week 15.