Can Men With High Prolactin Produce Breast Milk? Explained

Yes, it is biologically possible for men with hyperprolactinemia (high prolactin levels) to experience galactorrhea (milky nipple discharge), but it is incredibly rare ^[1].

While both men and women produce prolactin, the way elevated levels manifest physically can be very different between sexes.

How Does Galactorrhea Compare Between Men and Women?

In women, galactorrhea is a well-known symptom of hyperprolactinemia. It is reported in roughly 63% to 70% of female patients in some clinical studies ^[2][3]. In contrast, galactorrhea in men is so uncommon that it is mostly documented in medical literature through isolated case reports. These often involve specific tumors like prolactinomas (benign tumors of the pituitary gland that secrete prolactin) ^[1][4].

When it does occur in men, it is typically a small amount of milky discharge rather than producing enough milk to feed an infant.

Important Safety Note: Not all nipple discharge is galactorrhea. If you experience a new breast lump, skin changes, nipple retraction, or discharge that is bloody, clear, one-sided, or spontaneous, you should be evaluated by a doctor promptly to rule out other breast conditions.

What Are the More Common Symptoms in Men?

Rather than producing milky discharge, men with high prolactin are much more likely to experience symptoms caused by a drop in testosterone. Elevated prolactin disrupts the brain signals that tell the testicles to produce testosterone. This leads to hypogonadism (low testosterone) ^[5].

Because of this hormonal shift, men are far more likely to experience the following:

• Gynecomastia (Breast Enlargement): Instead of lactating, men with high prolactin may experience an increase in breast tissue size ^[6]. This happens due to the imbalance between testosterone and estrogen, and can also be influenced by other underlying causes.
• Sexual Dysfunction: A reduction in sex drive (libido) and erectile dysfunction (ED) are frequently reported by men with hyperprolactinemia ^[7][8]. In one study of a prolactinoma cohort, over half of the men had ED at the time of their diagnosis ^[9].
• Infertility: High prolactin can lower sperm count and quality, making it difficult to conceive ^[10][11].

Important Safety Note: Large pituitary tumors can press on nearby structures. If you experience sudden or severe headaches, or changes in your vision (especially a loss of peripheral vision), seek immediate medical evaluation.

Causes and Treatments

Hyperprolactinemia in men can be caused by prolactinomas, but it can also be triggered by hypothyroidism, kidney or liver disease, or certain medications. These can include some antipsychotics, anti-nausea drugs, and opioids. Never stop taking prescribed medications without discussing it with your doctor first.

Treating the underlying cause is the primary goal. For prolactinomas, dopamine-agonist medications (like cabergoline or bromocriptine) are commonly the first-line treatment. Surgery is reserved for specific, less common situations ^[11]. If a medication or thyroid issue is the cause, your doctor will manage that specific condition with alternative treatments or dose adjustments.

Lowering prolactin levels often allows testosterone production to restart. Over time, this improves symptoms like ED, low libido, and sperm production ^[12][11].

However, in studies of men with prolactinomas, over 20% continued to have low testosterone even after their prolactin levels returned to normal ^[13][14]. In these cases, your doctor may discuss testosterone replacement therapy.

Caution for Patients Trying to Conceive: Exogenous testosterone replacement can suppress sperm production. If you are trying to conceive, you must discuss fertility-preserving options with an endocrinologist or reproductive urologist before starting testosterone therapy.