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Message: <blockquote data-quote="athula.j" data-source="post: 20797153" data-attributes="member: 239395">Aetiology[1][2] When galactorrhoea is accompanied by amenorrhoea, it is usually caused by hyperprolactinaemia.PhysiologicalPregnancy and post-lactation: women may lactate from the second trimester, and may continue to produce milk up to two years after stopping breast-feeding.Fluctuating hormone levels: puberty and the menopause.Neonatal: exposure to maternal hormones in utero can produce gynaecomastia and galactorrhoea in the newborn (sometimes known as 'witch's milk'); no action is required and it will subside rapidly and spontaneously.Nipple stimulation or suckling.Non-physiological causes of hyperprolactinaemiaIdiopathic hyperprolactinaemia (40% of cases of hyperprolactinaemia).Prolactinomas (PRL levels are usually very high in this case as the tumour causes hypersecretion of PRL).Other causes of hypersecretion of PRL:Addison's disease.Acromegaly.Cushing's disease.Metastatic tumours.Infections such as tuberculosis.Sarcoidosis.Histiocytosis.Drugs (see 'Drugs that raise PRL', below).Systemic disorders:Chronic kidney disease.Liver failure.Hypothyroidism.Epileptic seizures.Chest wall lesions or irritation:Breast surgery.Burns.Herpes zoster.Spinal cord injury.Trauma.Pituitary stalk infiltration or interruption, due to:Sarcoidosis, tuberculosis, or schistosomiasis.Multiple sclerosis.Resection of the pituitary stalk.Tumours: meningioma, craniopharyngioma, dysgerminoma, dermoid cyst, pineal gland tumours.Empty sella.Rathke's cyst.Irradiation.</blockquote>

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