What causes nipple discharge?
- Hormonal changes
- Certain medicines
- Benign changes in the milk ducts
- Infection
- Pregnancy or breastfeeding
Discharge that is clear, milky, or greenish and comes from both breasts is often benign. Discharge that is bloody, comes from only one breast, or happens without squeezing needs a closer look.
When to see a doctor
See Dr. Chandak promptly for bloody discharge, discharge from only one breast, discharge unrelated to pregnancy or breastfeeding, or discharge that comes with a lump.
What to expect at the clinic
Dr. Chandak may recommend an ultrasound or mammogram, and in some cases, testing a sample of the discharge itself. If you've also noticed an armpit lump or pain, that's worth mentioning too.
Frequently asked questions
Not always — many causes are benign, especially discharge that is clear or milky and comes from both breasts. Bloody or one-sided discharge needs prompt evaluation.
Usually an ultrasound and/or mammogram, and sometimes testing the discharge fluid itself.
Discharge during pregnancy or breastfeeding is usually normal. Outside of that, new discharge should be checked.