 [ Symptoms ] i never breastfed my four children and i know i am not pregnant so why would my breasts be producing milk [ Disease ] there are several other reasons to be having nipple discharge besides pregnancy or breastfeeding some of these can include 1 elevated prolactin level hormone that is elevated during breast feeding to make the milk due to medications  there are medications which can raise the blood prolactin level which then causes milk production the most common ones are anti psychotics and other psychiatric meds sometimes the older blood pressure medications or even very high levels of thc have been implicated 2 pituitary adenoma  this is a benign growth inside the pituitary gland which stimulates the production of prolactin the pituitary gland is where prolactin is always made 3 estrogen  in some women estrogen e g birth control pills can increase milk production 4 breast stimulation  if nipple play is a consistent part of sex it can raise prolactin levels just as a nursing baby can 5 other type of breast discharge being mistaken for breast secretionsmilk  this is more often the case if the milk is coming from just one breast or just a couple of ducts in the nipple you really should see a gyn or your local county family planning clinic they will do a blood test to measure prolactin level to see if it is elevated if the problem is on one side only then a breast ultrasound or mammogram depending upon your age can be ordered if indicated a ductogram may be needed if the discharge if from one duct only if you are having a lot of milk you should get checked out