The most common causes of nipple discharge are:
Less common causes of nipple discharge are:
Prolactin is a hormone that tells your body to make breast milk after you have a baby. However, prolactin can be produced by certain health problems, such as thyroid or liver disorders, and certain medicines.
Go to a doctor within 1 to 2 days if you have nipple discharge and signs of infection:
Go to a doctor within a week or so if you have nipple discharge and:
Doctors will ask you questions about your symptoms and health. They’ll do an exam, including a breast exam.
To find out what's causing your nipple discharge, doctors may do other tests, such as: