Published on: 6/18/2025
What could be the reasons for a swollen right armpit?
A swollen right armpit can be caused by infections, swollen lymph nodes, injury, or other medical conditions and should be evaluated if persistent or painful.
Explanation
Swelling in the right armpit may be due to:
Swollen lymph nodes: Often caused by infections nearby, such as skin infections, respiratory illnesses, or after vaccinations. Infections: Abscesses or boils in the armpit area can cause swelling, redness, and tenderness. Injury or irritation: Shaving, deodorants, or friction can sometimes cause swelling or inflammation. Cysts or lumps: Noncancerous cysts or lipomas can cause localized swelling. Cancer: In rare cases, swollen lymph nodes from lymphoma or breast cancer can cause armpit swelling. Allergic reactions: To antiperspirants, soaps, or insect bites in the area.
If the swelling lasts more than a week, is painful, growing, or associated with other symptoms like fever or unexplained weight loss, it is important to seek medical evaluation.
(References)
- Görkem SB, & O'Connell AM. (2012). Abnormal axillary lymph nodes on negative mammograms. Diagnostic and interventional radiology (Ankara, Turkey), 22415745.
- de Andrade JM, Marana HR, Sarmento Filho JM, Murta EF, Velludo MA, & Bighetti S. (1996). Differential diagnosis of axillary masses. Tumori, 9061072.
- Donuru A, Obaid H, Al Attar M, Kandula V, & Purnell D. (2007). Axillary lump: an unusual presentation of fat necrosis in the .... Australasian radiology, 17875154.
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