Nipple Discharge: Causes and Concerns in Breast Health - Breast and Thyroid

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Nipple discharge


I would like to ask about occasionally squeezing the nipple and noticing a yellowish substance that resembles a pimple or keratin coming out.
This happens sometimes but not always.
Is this a pimple or something like keratin? There are also multiple areas on the nipple affected.

Yuan Yuan, 20~29 year old female. Ask Date: 2015/07/13

Dr. Zhou Jiazhen reply Breast and Thyroid


Dear Yuan Yuan,
Hello, some of these are remnants from skin glands, while others are secretions from the milk ducts that have dried up.
Please pay attention to any eczema-like changes around the nipple and areola.
If these changes persist, it is advisable to follow up with a breast surgery outpatient clinic.
Wishing you safety and health,
Director of Surgery, Taoyuan Hospital, Ministry of Health and Welfare
Zhou Jiazhen

Reply Date: 2015/07/13

More Info


Understanding nipple discharge can be a source of concern for many individuals, particularly when it presents in unusual forms or frequencies. The discharge you describe, which appears as yellowish material resembling a pimple or keratin, can be attributed to several benign conditions, but it is essential to consider the context and accompanying symptoms.

Firstly, the presence of yellowish discharge from the nipple can often be related to the accumulation of keratin, which is a protein found in skin cells. This keratin can become trapped in the ducts of the nipple, leading to the formation of small cysts or plugs. These plugs can sometimes be expressed, resulting in the discharge you are observing. This condition is generally benign and is often referred to as "nipple duct ectasia." It is more common in women who are approaching or have gone through menopause, but it can occur at any age.

Another possibility is the presence of sebaceous glands in the nipple area, which can produce an oily substance that may appear as a yellowish discharge. This is typically harmless and can be a normal variation in breast anatomy.
However, it is crucial to differentiate between benign discharge and that which may indicate a more serious condition. If the discharge is accompanied by other symptoms such as pain, redness, swelling, or if it occurs spontaneously (without squeezing), it is advisable to seek medical evaluation. Conditions such as infections, intraductal papillomas (non-cancerous tumors within the ducts), or even more serious concerns like breast cancer can sometimes present with nipple discharge.

In your case, since you mentioned that the discharge occurs occasionally and is not associated with pain or other alarming symptoms, it is likely to be benign. However, it is essential to monitor the situation. If you notice any changes in the discharge's color, consistency, or frequency, or if you develop any new symptoms, you should consult a healthcare provider for further evaluation.

Regular breast self-exams and routine check-ups with a healthcare professional are vital for maintaining breast health. During these exams, you can assess any changes in your breasts, including the presence of lumps, changes in size or shape, and any unusual discharge. If you have a history of breast issues or if you have undergone any breast surgeries, such as the removal of benign tumors, it's particularly important to stay vigilant and maintain open communication with your healthcare provider.

In summary, while the yellowish discharge you are experiencing is likely benign, it is essential to remain observant and proactive about your breast health. If you have any concerns or if the discharge changes in nature, do not hesitate to reach out to a healthcare professional for a thorough evaluation. Regular monitoring and awareness of your body are key components in ensuring breast health and addressing any potential issues early on.

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