Postpartum Body Changes: What Causes My Breast Pains?

Jul 7, 2025

3 mins

Breast pain in the days and weeks after giving birth is extremely common, but that doesn't make it any less uncomfortable, or any less confusing when you're trying to figure out what's normal and what needs attention.

This guide walks through the three most common causes of postpartum breast pain, how to tell them apart, and what you can do to find relief at each stage.

What Causes Postpartum Breast Pain?

Postpartum breast pain is extremely common and is typically caused by one of three things: the letdown reflex, breast engorgement, or mastitis — each with distinct characteristics and management approaches.

Most breast discomfort in the early postpartum period resolves within days to a few weeks as your body regulates milk supply to match your baby's feeding demands.

By around four months postpartum, breasts may no longer feel constantly full. This is a sign of a mature, well-regulated milk supply — not a drop in production, even though it can feel that way at first.

Understanding Breast Engorgement

Breast engorgement occurs when the breasts overfill with milk, blood, and lymphatic fluid — typically appearing 2 to 5 days after birth when milk production begins in earnest.

How to Relieve Breast Engorgement at Home

Nurse every 2 to 3 hours — frequent and effective milk removal is the most important step in relieving engorgement
Apply a warm compress for a few minutes before feeding to encourage milk flow, then switch to a cold compress or chilled cabbage leaves after feeding to reduce swelling and pain
Try Reverse Pressure Softening before latching — apply gentle, steady pressure around the nipple to move fluid back and soften the areola, making it easier for your baby to achieve a deep latch

The Letdown Reflex: What to Expect

The letdown reflex is triggered by the hormone oxytocin, which signals the muscles in the breast to release milk when your baby feeds — or even in response to your baby's cry.

Sensations vary widely between mothers, from a mild tingling to temporary pain or aching. Most women find that any discomfort fades significantly as breastfeeding becomes established.

Engorgement vs Mastitis: How to Tell Them Apart

	Breast Engorgement	Mastitis
Symptoms	Swollen, hard, warm, tender breasts; nipples may flatten, temporarily making latch harder	Redness, warmth, localised swelling, flu-like symptoms such as fever and chills
Which breast(s)	Typically affects both breasts	Usually presents in one localised area
Underlying cause	Overfilling with milk, blood, and lymphatic fluid as production ramps up	Current clinical guidelines describe it as an inflammatory condition most commonly driven by oversupply and an imbalance in breast bacteria, rather than simply a blocked duct

If fever exceeds 38.3°C or flu-like symptoms develop, seek medical advice promptly — this may indicate mastitis rather than straightforward engorgement. If mastitis symptoms appear, consult your healthcare provider promptly; management focuses on reducing inflammation rather than aggressive draining.

Supporting Your Recovery Through Lactation Nutrition

Your nutritional needs during breastfeeding are even higher than during pregnancy, and a well-nourished diet supports your own postpartum recovery. Key nutrients to prioritise during lactation include:

Nutrient	Daily target
Calcium	1,000 mg
DHA	At least 200 mg
Iron	—
Iodine	—

Deficiencies in any of these can affect your own recovery, and some — such as DHA and iodine — transfer into breast milk at levels that depend on maternal intake. PROMAMA is scientifically formulated with a complete combination of DHA, calcium, iron, and essential vitamins, carefully crafted to help bridge postpartum nutrient gaps in a single daily serving designed for breastfeeding mothers.