Beginning stages of mastitis: signs and next steps

Symptoms may develop while breastfeeding or expressing milk. Redness can be harder to see on darker skin, so warmth, tenderness and swelling may be more noticeable. Mastitis can worsen if inflammation continues or infection develops, so respond early rather than waiting for severe pain.

Mastitis is inflammation of breast tissue. Milk build-up, pressure and tissue swelling can narrow milk flow, while nipple damage may allow bacteria to enter. A firm or wedge-shaped tender area can occur, but a lump alone does not establish the cause. A clinician may check for an abscess if there is a persistent, very painful swelling or a fluid-filled area.

Continue feeding responsively from the affected breast if you are able; breastfeeding with mastitis is generally compatible with feeding your baby. Avoid forceful massage, deep pressure or repeatedly pumping beyond your baby's needs, because these can aggravate swelling. Use a cool compress after feeds, rest, drink to thirst and wear a supportive bra that does not compress the sore area.

Check positioning and attachment if feeding is painful or the breast is not softening. A lactation professional can observe a feed and suggest adjustments. Ask a pharmacist or clinician which pain relief is suitable for you, especially if you have allergies, stomach, kidney or liver problems, or take other medicines.

Contact a clinician promptly if you have fever or flu-like illness, symptoms are worsening, or home measures are not bringing improvement. Seek urgent care for confusion, fainting, trouble breathing, severe weakness, rapidly spreading redness, or if you feel seriously unwell. A persistent soft or fluctuant swelling, pus from the nipple, or worsening focal pain also needs assessment for an abscess.

Ask whether your symptoms fit inflammatory mastitis or a bacterial infection, whether antibiotics are appropriate, and how soon improvement should begin. You can also ask how to manage milk supply without overstimulation, which pain relief suits you, and whether a focused breast examination or imaging is needed for a persistent swelling.