Yes, it means liver flushing.
If she wants to seriously cure herself from arthritis, this is the way to go. Without doing colonics, the liver flushes are too risky for her. Most arthritic people have very congested colons with spastic zones, which must be cleared before liver cleansing.
It is certainly more off-putting to keep that stuff inside the body than releasing it. This may be a test for her, how determined she is about improving her health.