Nipple Issues: What Yellow Discharge and Blood Mean - Breast and Thyroid

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Nipple issues


Hello Doctor: Two days ago, I noticed swelling in my nipple, which I thought was just premenstrual swelling.
However, today while showering, I discovered that when I squeeze my nipple, a yellowish, pus-like fluid comes out, and eventually it turns into blood and then blood-tinged fluid.
What could this be? I'm very worried that I might have breast cancer.
Thank you for your help.

Jiong Mie, 30~39 year old female. Ask Date: 2016/04/22

Dr. Zhou Jiazhen reply Breast and Thyroid


Dear Qiong Mie: It is common to have increased discharge before menstruation, but it is less common for it to be blood-tinged.
I'm not sure if the bleeding could be caused by excessive straining.
Please keep an eye on it, and if it persists, it may be indicative of a papilloma or other conditions that require outpatient examination.

Reply Date: 2016/04/22

More Info


When it comes to nipple discharge, especially when it presents as yellow fluid that eventually turns to blood, it can understandably cause concern. While it is important to consult a healthcare provider for a thorough evaluation, I can provide some general insights into what these symptoms might indicate.

Firstly, nipple discharge can occur for a variety of reasons, and not all of them are serious. Common causes include hormonal changes, infections, or benign conditions. For instance, if you are nearing your menstrual period, hormonal fluctuations can lead to breast tenderness and changes in discharge. This is often benign and related to the menstrual cycle.

However, the presence of yellow discharge that resembles pus could indicate an infection, such as a breast abscess or mastitis. Mastitis is an infection of the breast tissue that results in breast pain, swelling, warmth, and redness, and it can lead to discharge. If the discharge is thick and yellow, it may suggest the presence of pus, which is a sign of infection.

The transition from yellow discharge to blood is particularly concerning. Blood in the discharge can be a sign of several conditions, ranging from benign issues like duct ectasia (where a milk duct beneath the nipple dilates, fills with fluid, and thickens) to more serious conditions, including intraductal papilloma or, in rare cases, breast cancer. While breast cancer is a serious concern, it is important to remember that most nipple discharges, especially those that are not spontaneous and are associated with squeezing, are not cancerous.

Given your symptoms, it is crucial to seek medical attention. A healthcare provider will likely perform a physical examination and may recommend imaging studies, such as a mammogram or ultrasound, to assess the breast tissue. They may also consider a ductogram if there is a concern about a specific duct. If an infection is suspected, they may prescribe antibiotics.

In the meantime, it is advisable to avoid squeezing the nipple, as this can exacerbate any underlying issues and may lead to further irritation or infection. Maintaining good breast hygiene is also important. If you notice any additional symptoms, such as fever, increased pain, or a change in the appearance of the breast, you should seek medical attention promptly.

In summary, while nipple discharge can be caused by a variety of benign conditions, the presence of yellow discharge that turns to blood warrants a thorough evaluation by a healthcare professional. Early diagnosis and treatment are key to managing any potential issues effectively. Please do not hesitate to reach out to your healthcare provider for personalized advice and care.

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