As much as I hate discussing any player's medical issues (because it is always pure speculation), in her last game this season, she she caught an elbow to the side of her head (no foul was called) and when she went to the bench, she had an ice pack on the spot. She allegedly has been using ice packs during other games that she has played in. I am guessing that the elbow is the reason for her being in the protocol now.
As has been posted before, we should not expect "medical updates" for any player. When she returns to practice, pregame shoot around and warmup, I am guessing that it will be tweeted by members of the media.