"It's my shoulder, we'll see," Lundqvist said following the Rangers' 5-2 loss. "We'll take a look at it."
Lundqvist stopped Paille's shot with his chest and dove on the puck in front of the crease to cover it and stop play. He stayed down briefly before getting up, then started to skate back and forth through the paint, flexing his left arm.
Officials held play for several extra seconds to let him work it out.
Lundqvist finished the game and was not wearing an ice pack when he spoke to the media afterward.
He has allowed eight goals on 80 shots in two games against the Bruins. He faced 32 shots in Game 2. The last time Lundqvist had allowed five goals in a game was March 9, 2011 at the Anaheim Ducks, a streak of 152 games.
Game 3 is Tuesday at Madison Square Garden (7:30 p.m. ET; NBCSN, RDS, TSN). The Rangers trail the best-of-7 series 2-0.