Smith met with a doctor to treat his left foot, according to The Charlotte Observer.
Smith isn't expected to miss significant time, according to a team official. He was on crutches after returning to Bank of America Stadium following the doctor's visit.
Smith has been held out of practice all week. He played with the rest of the first team in Saturday's preseason win over the Miami Dolphins, finishing with one catch for 15 yards.
Follow Dan Hanzus on Twitter @danhanzus.