Elizabeth Wende Breast Care

How the COVID vaccine can show up on a mammogram

Feb 23, 2021
National Cancer Institute

After a COVID-19 vaccination, a person's underarm lymph nodes may become swollen on the same side of the body where they had the injection. That's normal. In fact, it's a sign that the immune system is responding to the vaccine. However, the swelling may also show up on mammogram images.