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Swollen lymph nodes under arm

Swollen lymph nodes under arm

Overview

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

Review Date 7/8/2023

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