Mom is worse, but is being taken off of hospice. How can I help her?

If you feel your mom should continue to qualify then you need a doctor to certify that, ask either her own primary doc or perhaps one from a different hospice.

When people get worse, hospice doesn't stop. It is re-evaluated and continued of the patient is in EOL. Perhaps you misunderstood the nurse. Is mom receiving pain meds and antianxiety meds? Or is she just really sick? Hospice usually means they are actively dying--within 6 months or sooner. People DO com off hospice if their health improves to the point that it's not needed, but someone who is so very ill really needs the care.

Talk to her dr.

From the National Hospice and Palliative Care Association website;

Hospice eligibility requirements;
In order to be eligible to elect hospice care under Medicare, an individual must be entitled to Part A of Medicare and certified as being terminally ill by a physician and having a prognosis of 6 months or less if the disease runs its normal course. 42 CFR 418.20 § 418.20 Eligibility requirements.

Hospice Pre-Election Evaluation and Counseling Services (CR 3585) - Medicare allows for a one-time visit by a physician who is either the medical director of or employee of a hospice agency to:
evaluate the individual’s need for pain and symptom management,
counsel the individual regarding hospice and other care options,
advise the individual regarding advanced care planning.

In order to be eligible to receive this service, a beneficiary must:
be determined to have a terminal illness (which is defined as having a prognosis of 6 months or less if the disease or illness runs its normal course;
not have made a hospice election, and
not previously received the pre-election hospice services.

Eligibility and the Local Coverage Determinations (LCDs);
The LCDs for the hospice’s geographic area are used as guidelines to help a physician determine hospice eligibility. The LCDs are not regulations and should not be used exclusively to determine or provide evidence of hospice eligibility. Certification or recertification is based upon a physician’s clinical judgment, and is not an exact science. Congress made this clear in Section 322 of the Benefits Improvement and Protection Act of 2000 (BIPA), which says that the hospice certification of terminal illness “shall be based on the physician’s or medical director’s clinical judgment regarding the normal course of the individual’s illness.”
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I hope this clears up the requirements. As I understand it, as a hospice nurse, anyone with Medicare, whose doctor determines that they have less than 6 months to live, can sign on with hospice. Once on hospice, you can NOT go to the hospital for "life extending" treatment but you are allowed to go for "comfort measures" (draining fluids to receive pain, broken bones, etc.)

There are standards that keep you on hospice (or remove you from hospice). If your mother is stable (vital signs good), not showing pain or difficulty breathing or severe anxiety, does not show decline, is eating, transferring, eliminating and sleeping well.... then she would be deemed stable and not "in need" of hospice services.