Breast Cancer and Lyme Disease: When Symptoms Should Not Be Ignored
New symptoms should not automatically be blamed on Lyme disease
Diagnostic anchoring may delay evaluation of serious conditions
Persistent breast symptoms deserve prompt medical assessment
There is no established evidence that Lyme disease directly causes breast cancer. However, patients living with chronic Lyme symptoms may mistakenly attribute new lumps, pain, fatigue, or other changes to Lyme disease itself, potentially delaying important medical evaluation.
In some cases, serious conditions such as breast cancer may be discovered only after a broader diagnostic workup is pursued.
One woman shared how she initially assumed a breast lump was related to Lyme disease rather than cancer.
“Before I was diagnosed with breast cancer, I thought a lump I had found was part of my Lyme disease,” she explained in an interview with Glamour magazine.¹
When Chronic Illness Changes How Symptoms Are Interpreted
Patients living with chronic illness may unintentionally develop “diagnostic anchoring,” where new symptoms are assumed to be part of an existing condition rather than evaluated independently.
For some Lyme disease patients, repeated experiences of dismissal or uncertainty within the healthcare system may contribute to delays in seeking additional medical evaluation.
The woman described becoming accustomed to minimizing her own symptoms after years of dealing with Lyme disease.
“I had a lot of experience being blown off by doctors,” she explained.¹
Eventually, she was diagnosed with Stage IIIC breast cancer and later Stage IV disease after recurrence.¹
Breast Symptoms Should Not Be Ignored
Persistent breast lumps, skin changes, nipple discharge, unexplained swelling, or new focal pain should be medically evaluated regardless of a prior Lyme disease diagnosis.
Although Lyme disease can cause generalized pain, inflammation, fatigue, and neurologic symptoms, it should not automatically be assumed to explain every new physical finding.
A patient can have Lyme disease and another serious medical condition at the same time.
Learn more about Lyme disease misdiagnosis.
Why Diagnostic Delays Matter
Delayed evaluation of cancer or other serious illnesses may affect treatment options and outcomes.
Patients with chronic Lyme disease symptoms may already feel overwhelmed by ongoing medical issues, making it harder to recognize when a symptom represents something new.
This challenge highlights the importance of maintaining an open diagnostic perspective rather than attributing all symptoms to a single condition.
Learn more about delayed Lyme disease diagnosis.
Living With Uncertainty
Patients coping with chronic illness often learn to monitor fluctuating symptoms over long periods of time.
While this can build resilience, it may also increase the risk that new symptoms are normalized or minimized.
The woman’s message to others was simple: even if you worry about being wrong, seek medical evaluation when new symptoms arise.¹
Frequently Asked Questions
Can Lyme disease cause cancer?
There is currently no established evidence that Lyme disease directly causes breast cancer.
Why might Lyme disease patients delay evaluation of new symptoms?
Some patients may assume new symptoms are part of chronic Lyme disease or may hesitate because of prior experiences feeling dismissed.
Can breast pain occur in Lyme disease?
Lyme disease may cause generalized pain or inflammation, but persistent breast symptoms still require independent medical evaluation.
What is diagnostic anchoring?
Diagnostic anchoring occurs when new symptoms are attributed to an existing diagnosis rather than reassessed independently.
When should a breast lump be evaluated?
Persistent breast lumps, skin changes, swelling, nipple discharge, or focal pain should be evaluated promptly by a healthcare professional.
Clinical Takeaway
Lyme disease can complicate how patients interpret new symptoms, particularly after years of chronic illness and medical uncertainty.
However, persistent or unexplained breast symptoms should not automatically be attributed to Lyme disease without appropriate medical evaluation.
Maintaining an open diagnostic perspective may help prevent delays in recognizing serious conditions that can coexist with Lyme disease.
Related Articles
These related articles explore delayed diagnosis, symptom overlap, and the importance of maintaining a broad clinical perspective in Lyme disease care.
Lyme disease misdiagnosis
Delayed Lyme disease diagnosis
Lyme disease symptoms guide
Persistent Lyme disease symptoms
Recovery from Lyme disease
Reference
- Kramer J. This Mom Has Terminal Breast Cancer, But She’s Still Fighting for Her Kids. Glamour. October 31, 2019.
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
I will leave a comment. God bless this family. I pray she passed pain free peacefully. I have had Lyme disease since childhood but did not know. Reared it’s horrible disease plus it’s coinfections with it 8 yrs ago. Needless to say I believe that I never have entered remission and meds only made me have seizures and other bad reactions. So, why am I writing this one because no one else wrote a nice note and two because I’ve had a lump in my breast for awhile. Have had full work up twice mammograms and ultrasounds spaced out. They say I have dense breast and it is hard to tell palpating and with technology. Thus I am told it is easier to miss feeling a lump therefore I have a higher risk. I’ve been twice now to GYN, she finally told me to see a breast surgeon if that will give me piece of mind. What do I do?? I feel like an idiot walking in with 2 CDs of my breast scans and they found “just dense breast” which could JUST increase the risk of breast cancer. Well how the heck do I monitor this? Everyday ♀️ I did not want to take the spotlight off this woman but want to encourage women not to wait! I’m going to go no matter how idiotic I feel. I’m 41. Not far from this young womans age. God bless your family! I can’t imagine the grief for everyone especially the adults! Much thanks to whomever posted this!
If there is a suspicious area from a mammogram, they should do a breast ultrasound to investigate further. If then they find it to be suspicious for cancer they will do a biopsy.
Go to the breast surgeon. They are very understanding and compassionate. This is about your life.
The same thing happened to me except it was lung cancer. Being a never smoker, doctors don’t consider cancer. The muscle pain that I was having was not from the Lyme but from the tumor growing. Unlike this lady, I DID go to doctors but told oh it’s acid or sleep apnea.
I advise my patients to see consultants for that reason, to rule out other illnesses.
I am taking radiation for breast cancer. I’ve only had 5 treatments, but have been broke out in a horrible raised rash since the second treatment. The radiation doctor says, he’s never seen this before. Do you think the radiation is causing the Lyme to flare up and cause me to breaks out?
I also only had 5 radiation treatments recently and the same thing happened to me. I had joint pain to. Went to my PCP was tested for Scarlett fever. Doctor didn’t even want to acknowledge possibility of Lymes flare up. It is sad that doctors are do education on Lymes diseases!
I got Lyme disease in October 2019 and when I had my blood tests the doctor said other than the Lyme disease I was healthy. By February 2020 I started having bad pains in my breast and over the next couple of months it became swollen. With no history of cancer and not being able to get a mammogram because of Covid I didn’t see a doctor until June 2020. I was then diagnosed with stage 4 Inflammatory Breast cancer with liver mets. I have always blamed the Lyme disease but my doctors barely acknowledge it
It is a shame the COVID-19 pandemic kept you from having the bad pain in your breast checked February 2020. I encourage my patients to check unexplained symptoms. I wrote the blog to encourage further research in this area.
We’re not going to get any help with Lyme because regular doctors and Specialist don’t know anything about it . They weren’t taught anything in Medical School except 30 days of antibiotics. I have so many tell me this . They have absolutely not clue what this stuff does . Not even Vanderbilt in Nashville. They don’t even send you to an Infectious Disease Doctor after being airlifted with an MRI showing a massive stroke at the base of my brain stem and getting airlifted to Vanderbilt. They just said I was taking the 30 day of antibiotic and sent me home without any more test or calling in Infectious Disease because of what it was doing to my brain .
People around you don’t even care because they don’t understand how deadly it is because they’re all ignorant to it . It’s a lonely disease and a rich man’s disease. I’m in the last stage and I’m just waiting to die . No help no support except for people close that see what it’s doing .
I’m tired of being blown off and I’m angry because we all deserve help just like anyone with cancer . I’m tired of seeing absolutely NO HOPE except for what God can do and he has kept me here . No one on this earth has . Your in your own when you get Chronic Lyme and that’s the REAL truth.
I advise my patients keep looking for a doctor with experience treating Lyme disease as part of their evaluation.