Significant Breast Size Difference: When to Seek Medical Advice? - Surgery

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Significant difference in breast size?


Recently, I noticed that my right breast is significantly smaller than my left breast, and the difference is quite obvious visually.
When wearing a bra, the right side feels less filled.
Previously, I experienced tenderness in both breasts before my menstrual period, but now only the left breast feels tender, while the right breast has no sensation at all.
Should I seek medical attention for this? If so, which specialty should I consult?

kandi, 10~19 year old female. Ask Date: 2005/07/28

Dr. Niu Zhenyuan reply Surgery


Dear Candy: Generally speaking, it is not uncommon for adolescent girls to have asymmetrical breast sizes during puberty.
As the girl’s body matures, the breasts will gradually become more symmetrical.
It is quite normal for one breast to develop before the other in the same girl, which is often due to the differing sensitivity of each breast to internal estrogen and progesterone levels.
The breast that is more sensitive may develop first and grow more rapidly, appearing larger; conversely, the breast that is less sensitive may develop later and grow more slowly, appearing smaller.
This temporary phenomenon of breast size asymmetry is not unusual, and there is no need for concern or intervention; it is best to be patient and wait.

Reply Date: 2005/07/28

More Info


It is quite common for women to experience differences in breast size, and many women have some degree of asymmetry. However, when the difference is significant, as you described, it can understandably raise concerns. In your case, where the right breast is noticeably smaller than the left and you have experienced changes in sensitivity and discomfort, it is advisable to seek medical advice.

Breast asymmetry can be attributed to several factors, including genetic predisposition, hormonal changes, and developmental variations. In some cases, significant differences in breast size can be linked to conditions such as breast hypoplasia (underdevelopment of breast tissue) or other developmental anomalies. It is also important to note that hormonal fluctuations, particularly those related to the menstrual cycle, can cause temporary changes in breast size and tenderness. The fact that you are experiencing pain and fullness in only one breast could indicate a hormonal influence, but it could also warrant further investigation.

Breast cancer is a concern for many women, especially when there are noticeable changes in breast tissue. While breast cancer can cause asymmetry, it is usually accompanied by other symptoms such as the presence of a lump, changes in skin texture, or discharge from the nipple. Since you mentioned that you have not noticed any lumps or other concerning symptoms, this is reassuring. However, it is still essential to monitor any changes closely.

Given your concerns, I recommend that you schedule an appointment with a healthcare provider who specializes in breast health. This could be a general surgeon, a breast surgeon, or a gynecologist. They will be able to perform a clinical breast examination and may recommend imaging studies such as a mammogram or breast ultrasound to evaluate the tissue more closely. These tests can help determine if there are any underlying issues that need to be addressed.

In terms of when to seek medical advice, it is generally a good idea to consult a healthcare provider if you notice any of the following:
1. Significant changes in breast size or shape that occur suddenly.

2. Persistent pain or discomfort in one breast that is not related to your menstrual cycle.

3. The presence of a lump or hard area in the breast.

4. Changes in the skin of the breast or nipple, such as dimpling, redness, or scaling.

5. Any unusual discharge from the nipple.

It is also important to perform regular self-examinations of your breasts, ideally a few days after your menstrual period ends, as this is when breast tissue is least likely to be swollen or tender. During these examinations, you should look for any changes in size, shape, or texture, and feel for any lumps or areas of hardness.

In conclusion, while breast asymmetry is common and often benign, your specific symptoms warrant a professional evaluation. Seeking medical advice will provide you with peace of mind and ensure that any potential issues are addressed promptly. Remember, it is always better to err on the side of caution when it comes to your health.

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