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Is one-sided accessory breast tissue under the armpit possible?

3 weeks ago

I have extra tissue under one armpit but nothing similar on the other side. It becomes more noticeable before my period. Is one-sided accessory breast tissue possible?

Asked By Anaya | Female | Age 26

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3 weeks ago

Answers (3)

Pristyn Care Team

Simplifying Healthcare

Aug 25 2026

Yes, one-sided (unilateral) accessory breast tissue, also known as axillary breast tissue, is possible and not uncommon. It often becomes more noticeable or tender before menstruation due to hormonal changes, just like normal breast tissue.

While it is usually benign, it is advisable to consult a doctor for a proper evaluation to rule out any other conditions and discuss treatment options if needed.

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Dr. Vinay Nandlal Baretha

Top Doctor

MBBS, MS-General Surgery, M.Ch-Plastic Surgery|11+ Years Experience Overall

Aug 29 2026

Yes, it can be , as tissue has variable sensitivity to the hormones and also it depends on the proportion of accessory breast tissue at the axilla.

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Dr. Abhishek Vijay Kumar

MBBS, MS - General Surgery, M.Ch. - Plastic Surgery|15+ Years Experience Overall

Sep 13 2026

Yes one sided axillary tail of breast is common.. If painful or cosmetic then you can opt for surgery

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