This link may be helpful: http://www.mayoclinic.com/health/nipple-discharge/WO0009
Take care and regards.
Hi,
Nipple discharge is the abnormal release of fluid from the nipples of the breast.The risk of nipple discharge increases with both age and number of pregnancies, but is also known to occur in adolescent boys and girls going through puberty. This might just be a normal part of the breast's function or can be due to: mammary duct ectasia, intraductal papilloma, galactorrhea, injury, abscess, fibrocystic changes or breast cancer.
Mammary duct ectasia is one of the most common causes of abnormal nipple discharge. Ducts beneath your nipple becomes inflamed and clogged with a thick, sticky, green or black substance and usually affects women in their 40s and 50s. On the other hand, fibrocystic breast changes result in lumpy, tender breasts and can produce a clear, yellow or light green discharge from the nipples. Mammogram or an ultrasound may be done to check the underlying cause. If the tests show fibrocystic changes as the underlying cause, no further treatment is necessary.Treatment will depend on the cause