The former Little House on The Prairie star was taken to hospital after she injured herself during a routine with professional partner Maksim Chmerkovskiy.
She was diagnosed with concussion and mild whiplash, and missed out on Tuesday's (10Apr12) results show to recover at home.
However, Chmerkovskiy reveals he will ban the star from taking part in next week's (begs16Apr12) show if she is not feeling better in the next few days.
He tells People.com, "She's in pain. She's got a big headache. The doctors said she has a minor concussion, and I know that's really unpleasant.
"I think we are coming back. I'm pretty sure. It's not up to me, it's up to her, (but) I haven't heard talks of not coming back. Although, if she wakes up tomorrow and continues to have a headache, I won't let her in the studio.
"We owe it to our fans to give them a reason to vote for us. I've always been very vocal about how you have to earn your stripes. But I'm not sure if this is the right strategy this season, because it's clearly not appreciated.
"Honestly, at this point, I'm not really sure if it's worth killing yourself and trying to put on a show."