Christina Applegate Reveals MS Diagnosis Was Wrong, Leaving Her Symptoms Unexplained

Key points

• Applegate revealed the misdiagnosis on her 'MeSsY' podcast, noting her doctor told her she did not have MS.
• She stated she is 'back at square one' because her symptoms, including mobility issues, remain unchanged or worse.
• Doctors will begin a new investigation next week to determine the cause of her ongoing health issues.
• Applegate expressed feeling like she 'let everybody down' after serving as a public advocate for MS.
• A neurologist noted that MS misdiagnoses are common due to the lack of a single definitive test.

Background

Applegate first announced her MS diagnosis in August 2021, describing it as a 'strange journey' and noting initial symptoms like numbness in her toes. She became a prominent advocate for the condition, co-hosting the 'MeSsY' podcast with Jamie-Lynn Sigler. In 2025, she reported being hospitalized over 30 times since her diagnosis. Earlier this year, she underwent a four-month hospital stay, returning to public view in September 2026 after her discharge.

How outlets are covering it

All outlets report the core fact of the misdiagnosis, but they emphasize different aspects of Applegate’s reaction. USA Today and CBS News focus on her emotional distress and the confusion of losing a diagnosis that explained her daily suffering. Page Six highlights the impact on her career, noting she lost her job and still requires a wheelchair, while also detailing the medical reasoning behind the error. ABC News provides a brief confirmation of the news without extensive detail. Dr. Marwa Kaisey, cited by CBS and Page Six, explains that nearly 20% of people diagnosed with MS do not actually have it, attributing this to the absence of a single diagnostic test.

Why it matters

This revelation underscores the challenges in diagnosing complex neurological conditions and the emotional toll of misdiagnosis on public figures. It also highlights the ongoing uncertainty surrounding Applegate’s health, as she continues to suffer from severe symptoms without a confirmed cause, raising questions about the reliability of initial medical assessments.

What to watch

Applegate’s doctors will begin a new investigation next week to identify the cause of her persistent symptoms. She will likely continue to document her health journey on her podcast, potentially shifting focus from MS advocacy to exploring other potential diagnoses.