Postpartum Breast Milk Leakage: What You Need to Know

Postpartum Breast Leakage: Physiology and Management

Milk leakage (galactorrhea) is common in early postpartum and during lactation. It is driven by the milk ejection reflex (let-down), not by breast fondling.

Physiology

• Suckling (or pump) → nipple stimulation → hypothalamus → posterior pituitary releases oxytocin → myoepithelial cell contraction → milk ejection.
• Prolactin (anterior pituitary) maintains milk synthesis.
• Let-down can be conditioned: hearing baby cry, thinking of baby, warm shower, sexual arousal (oxytocin release during orgasm).

When Leakage Occurs

• Between feeds (oversupply, long intervals)
• During feed on opposite breast
• At night (engorgement)
• During intimacy (oxytocin surge)
• Randomly (conditioned reflex)

Management

• Nursing pads: Disposable or reusable (bamboo, cotton). Change when damp.
• Pressure: Cross arms over breasts firmly at first let-down sensation to suppress ejection temporarily.
• Collect milk: Silicone catchers (Haakaa) on non-nursing side — save for later use.
• Regulate supply: If oversupply, block feeding (one breast per block), avoid excessive pumping.
• Comfort: Dark, patterned tops; layers.

When to Seek Help

• Painful leakage, cracked nipples
• Signs of mastitis (red wedge, fever, flu-like)
• Persistent oversupply causing infant choking/gas
• Galactorrhea unrelated to pregnancy/lactation → check prolactin, thyroid, medications.

Leakage is a sign of active lactation, not a problem to "fix." It typically diminishes as supply regulates (~6–12 weeks).