Nipple discharge is a common part of breast functioning, which normally occurs during breast-feeding or pregnancy. It is often associated with the changes of menstrual hormone. The milky discharge post breast-feeding usually continues for up to two years after stopping nursing. The condition normally gets resolved on its own but if the situation persists for a long time resort to medical assistance.
The following are some of the causes of normal nipple discharge:
What is an abnormal nipple discharge: An abnormal nipple discharge is usually bloody in color and is accompanied with tenderness of the breast. Papilloma is a non-cancerous tumor that is often responsible for bloody nipple discharge. Continuous nipple discharge from one of the breasts or nipple discharge that arises without any stimulation or external irritation is abnormal in nature.
The possible causes of abnormal nipple discharge include:
What Causes Galactorrhea: Galactorrhea is commonly caused by hyperprolactinemia, especially when it is associated with amenorrhea. Hyperprolactinemia is most often induced by medication or associated with pituitary adenomas or other sellar or suprasellar lesions.
The release of prolactin from the pituitary is held in check by dopamine from the hypothalamus. Prolactin release is encouraged by serotonin and thyrotropin-releasing hormone. This balance can be disrupted by medication (ie. antipsychotics), underactive thyroid function, pituitary tumors, hypothalamic tumors, damage to the pituitary stalk, nipple stimulation, chest trauma, herpes zoster, and emotional stress as well as a variety of other factors.