What is the cause of breast coming out when you don't hav a baby?

Milk from breast?: Possible causes for galactorrhea include but are not limited to use of birth control pills, tricyclic antidepressants, antipsychotic meds, some sedatives, fennel, anise, fenugreek, some hypertension meds, cocaine, opioids, hypothyroidism, prolactinoma, renal dz, testosterone deficiency in men ; significant breast stimulation. Get med eval.