What Does Nipple Discharge Mean?

October 28, 2025

2 min read

Do you have nipple discharge, but you aren’t pregnant or breastfeeding? Nipple discharge can be completely harmless, but it can also be a sign of a serious illness. The first thing to look out for is the color of the discharge. If you are experiencing it, you should seek advice from your doctor. It’s a good idea to pay them a visit every year, even without any unpleasant symptoms.

Key takeaways

Do you have nipple discharge, but you aren’t pregnant or breastfeeding?
What does the color tell you?
Does it show up only in women?

Who this is for

People exploring Preventive Oncology through oncology, women health.

Why it matters

This piece helps you get oriented quickly, then move into a collection or series if you want to keep going.

Article author

Dr. Halina

Mammologist

What does the color tell you?

Milky white This is the most common. Galactorrhea is a condition where a woman has milk or milk discharge from the nipples, even if she is no longer breastfeeding. This is the result of an overproduction of the pituitary hormone prolactin. Milk discharge can also be associated with a recent cessation of breastfeeding or hormonal changes before menopause. Hormone therapy (birth control pills) and sedatives can also similarly affect the breasts. Copious milk discharge from both nipples can be caused by a benign tumor of the pituitary gland (prolactinoma). Blood red One of the causes is a benign tumor (papilloma) that can irritate the tissues inside the milk duct. In rare cases, red spotting is associated with breast cancer, especially in older women. Transparent Discharge from both breasts, as a rule, does not pose a threat to health, but if you find them in only one breast, you should consult an oncologist. Green This color can be a symptom of a cyst, blocked milk ducts, or an infection in the chest. It is also one of the signs of fibrocystic disease. Yellow Mastitis is an infection of the breast that causes a pus-like yellow-green, accompanied by fever and chest pain. If the discharge develops an unpleasant odor, this may indicate an abscess.

Does it show up only in women?

Men can also experience nipple discharge. Some of the common causes include testosterone deficiency, gynecomastia—a condition that leads to breast enlargement and breast tenderness, pituitary swelling, and breast cancer.

What is the examination like?

First, the specialist will carry out a clinical examination of the breast. Then, they will order a mammogram and an ultrasound of the mammary glands to find the source of the discharge, as well as take a smear for cytology.

The doctor may also do a ductogram (X-ray method with the introduction of a contrast agent into the ducts of the breast). The data obtained will tell you if a biopsy is needed. In non-pregnant women who have heavy milk flow from both breasts, a blood test is taken to measure the level of the hormone prolactin.

Continue reading

Preventive Oncology#oncology

3 Key Reasons To Consult With a Mammologist

Women who want to have healthy and good-looking breasts should visit a mammologist once per year. But sometimes it's a big mistake to wait for a scheduled date. That is when you should consult with a medical professional without delay.

Dr. NicholasOct 28, 2025

Preventive Oncology#cancer

What Are the Chances of Inheriting Cancer?

There is a popular belief that cancer is hereditary and that if someone in your family was diagnosed with cancer, then all other close relatives are at risk. However, is this actually the case?

Dr. MarinaOct 28, 2025

Bacterial and viral infections#viruses

Human Papillomavirus: What Makes It So Dangerous and How To Diagnose It?

According to the National Cancer Institute of the United States, there are approximately 200 different types of HPV. The virus may remain latent for many years and can suddenly reactivate, causing significant health damage. We have answered some of the most frequently asked questions about HPV.

Dr. DimitriOct 28, 2025

Healthy lifestyle#headache

6 of the Rarest Medical Specialties

With the development of medicine, narrowly specialized specialists have appeared, whose task is to solve problems beyond the competence of general practitioners. Read on to find out if you need one of them.

HelenDec 10, 2025

Install Ornament to not only read these articles, but also track your health, store test results, and access other useful features

Install Ornament