Engorged breasts, blocked ducts and mastitis: signs and what to do
Full, tender breasts are common in the first days after birth and any time feeds are missed or spaced out. Most of the time this is engorgement or a blocked duct and it settles with frequent milk removal. Sometimes it develops into mastitis, an inflammation that may need medical treatment. Knowing the signs helps you act early.
Engorgement
When your milk comes in, usually two to five days after birth, the breasts can become heavy, warm, firm and sore. This is a normal part of establishing supply, and it often affects both breasts. It can also happen later if the baby sleeps longer than usual, you skip a feed or you wean quickly.
The best remedy is to feed or express often. If the breast is so hard that the baby cannot latch, express a little by hand or pump first to soften the area around the nipple. Cold packs between feeds and a supportive, not-too-tight bra can ease the discomfort.
Blocked ducts
A blocked duct feels like a tender, hard lump in one area of one breast, sometimes with a small red patch. You usually feel well in yourself, without fever.
Keep feeding on that side, starting there if comfortable, and make sure the baby is well latched. Gentle massage towards the nipple while feeding, and a warm shower or compress before feeding can help the milk flow. Avoid deep, forceful massage, which can irritate the tissue. Rest and plenty of fluids help too. Most blocked ducts clear within a day or two.
Signs of mastitis
Mastitis is inflammation of the breast, sometimes with infection. Typical signs include a red, wedge-shaped or patchy area that is hot and painful, together with flu-like symptoms such as fever, chills, aching and tiredness.
It often starts in one breast and can come on quickly. It is most common in the first weeks, but it can happen at any time while breastfeeding.
What to do if you suspect mastitis
Keep breastfeeding or expressing from the affected breast. The milk is safe for your baby, and emptying the breast is an important part of recovery. Rest as much as you can, drink to thirst and use cold packs for pain between feeds. Ask for help with your baby and the household so that you can lie down.
Contact a doctor the same day if you have a fever, feel unwell, see a red wedge on the breast or your symptoms are not clearly improving after 12 to 24 hours of frequent feeding. Some cases need antibiotics, and there are options that are compatible with breastfeeding. Your doctor can advise on pain relief that is safe for you.
Seek urgent care for these signs
Contact a doctor or out-of-hours service promptly if you have a high fever that does not come down, feel very unwell, or if a lump becomes very painful, hard and does not respond to treatment, since this can be a breast abscess.
Also see a doctor if a lump does not go away, or if you notice skin changes such as dimpling that is not related to feeding. Most lumps while breastfeeding are harmless, but they should always be checked if they persist.
Frequently asked questions
Can I keep breastfeeding with mastitis?
Yes, and it is usually recommended. Milk from a breast with mastitis is safe for your baby, and continued feeding helps the breast recover. If feeding is too painful, express milk instead.
How can I tell a blocked duct from mastitis?
A blocked duct is a tender lump without fever and you feel generally well. Mastitis usually comes with a red, hot area and flu-like symptoms such as fever and chills. If you are unsure, contact a doctor or health nurse.
How long does engorgement last?
Engorgement in the first days usually settles within a few days as feeding becomes regular and supply adjusts. Frequent feeding and gentle expressing for comfort help.
Should I stop breastfeeding if my breasts are very full?
No. Stopping suddenly makes engorgement and mastitis more likely. If you want to wean, do it gradually, and see our guide on weaning from breastfeeding.
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