High prolactin levels, or hyperprolactinemia, is a condition where the body produces more prolactin than necessary. Prolactin is a hormone responsible for various functions, such as stimulating breast milk production after childbirth and regulating reproductive functions. Elevated levels of prolactin, however, can lead to various health issues like irregular menstrual cycles, infertility, and, in some cases, reduced libido. This condition affects both men and women and can cause a significant impact on overall well-being.