Is It Normal for Accessory Breasts to Be Uneven? - Breast and Thyroid

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The sizes of the accessory breasts are different on each side?


Is it normal for the accessory breasts to be different on both sides? They are not painful (I just happen to be on my period and I usually don't wear a bra at home).
Thank you!

Chin, 20~29 year old female. Ask Date: 2022/07/28

Dr. Yuan Tianmin reply Breast and Thyroid


Most patients have asymmetrical sizes on both sides.

Reply Date: 2022/07/28

More Info


When it comes to accessory breasts, or supernumerary breasts, it is indeed not uncommon for them to appear uneven. This condition can be a result of various factors, including genetic predisposition and hormonal influences during puberty. Accessory breasts can develop along the milk lines, which extend from the armpits to the groin, and they may vary in size, shape, and even sensitivity.
In your case, the fact that you are not experiencing any pain is a positive sign. Pain or discomfort in breast tissue can often indicate other issues, but the absence of pain generally suggests that there is no immediate cause for concern. Hormonal fluctuations, particularly those associated with your menstrual cycle, can also affect breast tissue, leading to temporary changes in size and sensitivity.
It is important to note that breast tissue can respond to hormonal changes, which can cause swelling or tenderness, especially during menstruation. This is a normal physiological response and can happen in both primary and accessory breast tissue. If you notice that the unevenness persists or if there are any changes in the texture, size, or appearance of the accessory breasts, it would be wise to consult a healthcare professional for a thorough evaluation.

Additionally, while accessory breasts are generally benign, it is essential to monitor them for any unusual changes. If you experience any new symptoms, such as pain, lumps, or changes in the skin over the breast area, it is advisable to seek medical attention. Regular self-examinations can help you become familiar with your breast tissue, making it easier to identify any changes that may occur over time.

In summary, having uneven accessory breasts is typically normal and can be influenced by hormonal changes, especially during your menstrual cycle. However, maintaining awareness of your body and seeking medical advice if you notice any concerning changes is always a prudent approach. If you have further questions or concerns, consider scheduling an appointment with a healthcare provider who specializes in breast health for personalized advice and reassurance.

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