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Swollen lymph nodes under arm

Swollen lymph nodes under arm


Lymph nodes can become swollen as an immune response to local infection.

Review Date 7/19/2021

Updated by: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.