What happened to Brooks Ellis in the 4th Qtr?

I was at the game and noticed Brooks Ellis go down and run immediately to locker room only to return later in the game?
What happened? Is he ok?

He was everywhere on that field last night!!!

Cramps. He had a double IV and went back at it.

Got some IV in him I believe

Hot humid Texas night had our Hogs cramping

84 to start the game is hot and humid? Haven’t we seen much worse than that?