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A member asked:
My 5 month old baby has a hard lump under her right armpit.
A doctor has provided 1 answer
Likely a node: This is likely a lymph node that has reacted to some local stimulus. Lymph nodes are scattered throughout the body & act to sift through serum that contains germs or debris. They enlarge from pea sized to much larger if active. A bug bite, rash or infection on that arm may be the trigger. Your doc can confirm this.
Answered 2/2/2020
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