Christina Applegate suspects breast implants behind MS misdiagnosis
Synopsis
Christina Applegate's MS misdiagnosis story just got more complicated — and more personal. The actress now suspects her decades-old breast implants may be 'leaking and poisoning' her, producing symptoms that were mistaken for multiple sclerosis. With no confirmed diagnosis since 2021, she is being tested for lupus, RA, and Lyme disease while navigating what she calls an 'overwhelming' medical investigation.
Key Takeaways
Christina Applegate was mistakenly told she had multiple sclerosis (MS) in 2021 ; the diagnosis was later reversed.
She suspects her breast implants — in place since her 2008 double mastectomy — may be leaking and causing her symptoms.
Applegate said on her podcast Messy that she is aware of studies linking leaking implants to symptoms that can present as MS.
She is currently being tested for rheumatoid arthritis (RA) , lupus , and Lyme disease — conditions that can mimic MS.
The actress reports severe joint pain and says it takes her at least 10 minutes to get out of bed each morning.
No confirmed diagnosis has been reached; her medical investigation is described as ongoing.
Hollywood actress Christina Applegate has raised a pointed theory about her multiple sclerosis (MS) misdiagnosis — suggesting that leaking breast implants may have been responsible for the symptoms that led doctors to an incorrect conclusion. The revelation came during a candid episode of her podcast Messy, where Applegate opened up about her ongoing health struggles and the uncertainty that has followed a stunning reversal in her diagnosis.
The Misdiagnosis That Stunned Her
Applegate revealed last month that she had been mistakenly told she had MS — a progressive autoimmune condition — back in 2021. Rather than relief, the correction left her distressed. As she told her co-host Jamie-Lynn Sigler on the podcast, her doctor delivered the news with a congratulatory tone: 'Congratulations, you don't have MS' — to which Applegate said she was 'not happy at all'.
'You don't get misdiagnosed and then all of a sudden I'm better. I haven't gotten better, Jamie! If anything, I've gotten worse,' she said. The actress added that she is effectively 'back at square one', with no clear understanding of what has been affecting her health since 2021.
The Implant Theory
Applegate, who underwent a double mastectomy in 2008 following a breast cancer diagnosis and subsequently had breast reconstruction surgery, says she is now questioning whether her implants — which she describes as being 'way overdue' for replacement — could be the source of her symptoms.
'I had my double mastectomy in 2008 and I am way overdue for having them replaced. And I swear over the last five years or whatever, I've thought, 'What if they're leaking and poisoning me?'' she said on the podcast. Applegate told Sigler that she is aware of 'some study' linking symptoms from leaked breast implants to presentations that can resemble multiple sclerosis — a lead she says she intends to pursue with her doctors.
Notably, the condition she is referring to is sometimes discussed in medical literature under the umbrella of Breast Implant Illness (BII), a term used by patients and some clinicians to describe a range of systemic symptoms — though scientific consensus on the condition remains an active area of research.
Ruling Out Sister Diseases
As her medical team works to identify what is actually wrong, Applegate described a methodical process of elimination. She explained that she is currently being tested for conditions that can 'mimic' the symptoms of MS — including rheumatoid arthritis (RA), lupus, and Lyme disease.
'We're going into square one, just doing some testing and going one-by-one of the sister diseases to MS,' she said, adding that the process is happening 'slowly but surely'. Among her current, most prominent symptoms is severe joint pain — she admitted it takes her at least 10 minutes to get out of bed each morning because she 'hurts all over'.
A Long Road Ahead
Applegate acknowledged the overwhelming nature of navigating multiple, overlapping health possibilities. 'Getting my doctors to get all these tests done, that's a lot. It's overwhelming. There are so many different things that can be going on,' she said. The actress, who has been public about her health journey since her MS diagnosis was first disclosed, appears committed to transparency — using her platform to shed light on the complexities of autoimmune misdiagnosis and the emotional toll it carries. Her medical investigation is reportedly ongoing, with no confirmed diagnosis as yet.
Point of View
RA, and Lyme disease share enough symptomatic overlap with MS that misdiagnosis is not rare — it is a documented systemic failure. The breast implant angle introduces a less-settled medical conversation around Breast Implant Illness, where patient-reported symptoms remain ahead of scientific consensus. What is striking here is not just the misdiagnosis, but Applegate's reaction to it — distress, not relief — which captures exactly what chronic illness patients face when a label is removed without an alternative being offered. Her candour is doing real public health work, even if inadvertently.
NationPress
11 Nov 2026
Frequently Asked Questions
What was Christina Applegate's MS misdiagnosis?
Christina Applegate was told she had multiple sclerosis in 2021, but doctors later reversed that diagnosis. Rather than feeling relieved, she said she was 'not happy at all' because her health has continued to worsen with no alternative explanation found.
Why does Christina Applegate think her breast implants caused her symptoms?
Applegate says she has long wondered whether her breast implants — which she has had since her 2008 double mastectomy and considers overdue for replacement — could be leaking and 'poisoning' her. She cited 'some study' suggesting leaked implant symptoms can present like multiple sclerosis, and said she plans to pursue this with her medical team.
What conditions is Christina Applegate being tested for now?
She is currently being tested for rheumatoid arthritis (RA), lupus, and Lyme disease — all of which can mimic MS symptoms. She described the process as going 'one-by-one' through 'sister diseases' to MS, happening 'slowly but surely'.
What symptoms is Christina Applegate experiencing?
Applegate reports severe joint pain as her primary current symptom, saying it takes her at least 10 minutes to get out of bed because she 'hurts all over'. She has also described her overall health as worse than before the MS diagnosis was reversed.
What is Breast Implant Illness and is it recognised medically?
Breast Implant Illness (BII) is a term used to describe a range of systemic symptoms — including joint pain, fatigue, and cognitive issues — that some patients attribute to their implants. While the symptoms are widely reported by patients, scientific and medical consensus on BII as a formal diagnosis remains an active area of research, and no definitive causal link has been universally established.
