Causes of Nipple Discharge

Nipple discharge is something that women commonly experience when they are pregnant or breastfeeding. However, nipple discharge is also one of the key signs of breast cancer. Knowing the difference is key to early detection. 

What Is Nipple Discharge?

Nipple discharge is when fluid is leaking from one or both of your nipples. It is fairly common during late pregnancy and while breastfeeding.

Normal Discharge: 

• If the coloring is milky, clear or yellow

• Comes out of both nipples

• Happens when you squeeze your nipples

Abnormal Discharge:

• If the coloring is pink or red

• Comes out of only one nipple

• Comes out of your nipple on its own

• You also have pain or a lump in your breast 

What Causes Nipple Discharge?

While nipple discharge could be a sign of breast cancer it could also be because of many other reasons including:

• Pregnancy

• Breastfeeding 

• Widening of milk ducts

• Injury 

• Rubbing from a t-shirt or bra

• Infection

• Underactive thyroid gland 

• Clogged breast ducts

• Noncancerous tumors

• Fibrocystic breasts 

• Chronic kidney disease

• Medications, like birth control or antidepressants 

• Drug use

Nipple Discharge In Men:

If you are a man who is experiencing nipple discharge, discuss it with your physician as soon as possible.

While nipple discharge is mainly not an issue it is a good idea to talk to your doctor if you are experiencing it. Your doctor will most likely examine your breast and determine the next steps, which could include a biopsy, mammogram or ductogram. 

https://www.mountsinai.org/health-library/diseases-conditions/nipple-discharge

https://www.healthline.com/health/womens-health/nipple-discharge#causes