Fox's Pam Oliver reported that the Packers would not say if it was the same hamstring injury that cost Nelson two games earlier this season.
Nelson was hurt Sunday at the conclusion of a 10-yard reception with 6:02 remaining in the first quarter. Nelson jogged gingerly to the Packers' sideline, then was seen walking to the locker room.
Nelson, who's Green Bay's leading receiver, has 46 receptions for 658 yards and six touchdowns this season.
Follow Dan Hanzus on Twitter @DanHanzus.