Hi, According to your description the possible causes are: - Increased serum prolactin levels, which can be due to the intake of drugs like antacids, anti-psychotic drugs for long periods or pituitary microadenoma. In this condition, irregular menstrual cycles with inter-menstrual spotting can be seen and also discharge from the breasts can be seen in nonpregnant women. - Thyroid hormonal abnormalities also by affecting the serum prolactin levels can lead to these type of problems. - Rarely even after tubal ligation sometimes pregnancy is possible which can present with breast secretions and spotting per vaginum. By clinical examination and investigations like sonomammography, ultrasound abdomen and pelvis, serum prolactin levels, thyroid profile the possible cause of your problem can be identified and treatment can be taken accordingly. So, please consult your gynecologist once and get evaluated. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN