pregnancy, hormonal changes or medications can also cause yellow nipple. but let's not forget breast cancer also can be one of the symptoms.
6 Breast Things That Are Completely Normal—and When You Should Worry
What Is Nipple Banding, And Is It Harmful Or Dangerous?
Breast changes during or after pregnancy
Nipple Discharge Fact Sheet
Breast Milk Color: From Yellow to Blue to Pink, What It All Means
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Quality at a Steal Nipple Color and Other Changes: What's Normal?, nipple pain
Quality at a Steal Nipple Color and Other Changes: What's Normal?, nipple pain
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Nipple discharge without pregnancy may mean something serious
Breast Milk Color: From Yellow to Blue to Pink, What It All Means
