Hyperprolactinaemia is a medical condition that occurs when the levels of prolactin in the blood are abnormally high. There are several synonyms for hyperprolactinaemia, including hyperlactation, hyperlactacidaemia, hyperprolactinemia syndrome, and hyperprolactinemic disorder. These synonyms are often used interchangeably to refer to the same condition, which can result from a variety of factors, such as pituitary tumors, medications, and hormonal imbalances. Symptoms of hyperprolactinaemia may include galactorrhea (breast milk production), infertility, irregular menstrual cycles, and decreased libido. Treatment for hyperprolactinaemia typically involves medication to lower prolactin levels and address any underlying causes.