Galactorrhea

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Definition

Galactorrhea is a milky discharge from the nipple not associated with the normal milk production of breast-feeding. It usually occurs from both breasts. Galactorrhea isn't a specific disease but rather a sign of an underlying problem. Although it occurs most often in females, it can affect males.

In females, galactorrhea may be associated with excessive breast stimulation, medication side effects or disorders of the hypothalamus or pituitary glands. In males, it may be associated with erectile dysfunction and a lack of sexual desire due to testosterone deficiency (male hypogonadism). Sometimes the cause of galactorrhea can't be determined. But it often results from increased levels of prolactin, the hormone that stimulates milk production.

Galactorrhea sometimes occurs in newborns. High maternal estrogen levels cross the placenta into the baby's blood. This can cause enlargement of the baby's breast tissue, which may be associated with a milky nipple discharge.

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