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WHITTIER, Calif., April 28, 2021 /PRNewswire/ -- PIH Health is sending an important message to women across the nation: Don't delay your mammogram on account of potential swollen lymph nodes due to COVID-19 vaccines and don't delay COVID-19 vaccination as both are important to your health. Doctors have noticed that the Pfizer and Moderna COVID-19 vaccines can cause swollen lymph nodes under the arm in which the shot was given. These benign lymph node enlargements will show up on a mammogram, which may cause unnecessary worry.
For this reason, some healthcare providers suggest that women either get their mammograms before the vaccine, or postpone their mammograms until four to six weeks after receiving the vaccine—enough time for the lymph nodes to go back to their normal size.