Does anyone know if RR was in pain? Migraine?

I did a search and don't see anything about it, but does anyone know if RR had a migraine or something? I am re-watching the game and saw him sitting on the bench with a towel over his head and later, in the 4th quarter, 12:00 to go, taking off his helmet with a horrible look of pain on his face. I think he was in the game, playing through some bad pain of some kind, I suspect migraine, mainly to draw attention of coverage, but was hurting too bad to contribute much. Re-watch the game and look for this before flaming, please.