Christina Applegate has a new theory about what has been making her so sick. The actress thinks her breast implants might be to blame for the symptoms that led doctors to tell her she had multiple sclerosis.

Applegate raised the idea on her podcast "MeSsy," which she co-hosts with Jamie-Lynn Sigler. She explained that the implants are well past the point when they should have been swapped out. She worries they may be leaking inside her.

Someone close to her recently passed along research on the subject, she said. It suggests a ruptured implant can release toxins into the body. Those effects can then be mistaken for MS.

Still in serious pain

Ruling out MS has not ended her suffering. Applegate says she deals with a huge amount of pain every day.

She described being unable to move her arms or her shoulder. Some mornings simply getting out of bed is a struggle.

No clear answer yet

Applegate recently revealed to fans that she does not actually have MS. Since then she has gone through more testing to figure out what is really going on.

That news did not bring much comfort. She says she is frustrated to still be without a firm diagnosis.

The implants could turn out to be the culprit, she believes. For now she is waiting to find out.