Don't panic if you see a lump on your armpit after COVID-19 vaccination, doctors say
![Don't panic if you see a lump on your armpit after COVID-19 vaccination, doctors say](https://beta.ctvnews.ca/national/health/2021/3/9/1_5339253/_jcr_content/root/responsivegrid/image.coreimg.jpg)
As more Canadians receive COVID-19 vaccines, more and more people might encounter a side effect that radiologists want the public to be more aware of: swelling under the armpit, which can show up on mammograms during screenings for breast cancer.
As more Canadians receive COVID-19 vaccines, more and more people might encounter a side effect that radiologists want the public to be more aware of: swelling under the armpit, which can show up on mammograms during screenings for breast cancer.
![](https://ars.els-cdn.com/content/image/1-s2.0-S0899707121002837-gr1.jpg)
Unilateral axillary adenopathy in the setting of COVID-19 vaccine
![](https://e3.365dm.com/20/09/1600x900/skynews-coronavirus-graphic_5083931.jpg?20210126211824)
Long COVID: The debilitating after-effects of coronavirus
![](https://beta.ctvnews.ca/content/dam/ctvnews/videos/axis/2021/3/9/2156754/_jcr_content/renditions/videothumbnail.1615330889833.jpg)
Nova Scotia reveals AstraZeneca vaccine details, begins pharmacy vaccination clinics
![](https://x-default-stgec.uplynk.com/ausw/slices/fdb/b2c1c5c2af374f52af57ddcae54c6663/fdbce24b9fd7413c81a009bb91c11067/poster_30b91cffc6ba4338aa0c2079e2e80f16.jpg)
COVID-19 vaccine side effect mimics breast cancer symptom
![](https://www.ctvnews.ca/polopoly_fs/1.2058433.1488454140!/httpImage/image.jpg_gen/derivatives/landscape_1020/image.jpg)
Health news in Canada, CTV News
![](https://pbs.twimg.com/ext_tw_video_thumb/1358611494632624129/pu/img/KAMA9SCsye4sD6HE.jpg)
Stephanie Rubec (@StephRubec) / X
![](https://www.ctvnews.ca/polopoly_fs/1.5339888.1615310693!/httpImage/image.jpg_gen/derivatives/landscape_1020/image.jpg)
Eight new COVID-19 cases in Middlesex-London, Elgin-Oxford vaccinations snapped up
![](https://images.firstpost.com/wp-content/uploads/2021/03/head-neck-cancer-lump-COVID_sasirin-pamai.jpg?im=FitAndFill=(1200,675))
Enlarged lymph nodes after COVID-19 vaccination could be mistaken
![](https://cdn.abcotvs.com/dip/images/10558134_042821-kgo-woman-getting-vaccine-img.jpg)
Swollen lymph nodes: Doctors explain the COVID vaccine side effect
![](https://beta.ctvnews.ca/content/dam/ctvnews/images/2021/3/9/1_5339728.jpg)
Coronavirus: Ripple effects of loss creating hard-hitting 'grief pandemic
Daniel Petrie, MD, FRCPC (@DrDanPetrie) / X
![](https://static01.nyt.com/images/2021/04/14/well/14WELL-WOMEN-VACCINE2/14WELL-WOMEN-VACCINE2-mediumSquareAt3X-v2.jpg)
Women and the Covid-19 Vaccine: What You Need to Know - The New
![](https://i1.wp.com/media.globalnews.ca/videostatic/news/ba908z0krk-bukdk9eycl/VACCINE_STUDY_vosot.jpg?w=1040&quality=70&strip=all)
Why COVID-19 vaccines are raising false red flags of breast cancer
![](https://beta.ctvnews.ca/content/dam/ctvnews/images/2021/3/9/1_5261919.jpg?cache_timestamp=1615303640893)
Nova Scotia reports five new cases of COVID-19 Tuesday; five new variant cases identified