Mastitis while pregnant: what to know

Pregnancy hormones commonly make breasts fuller and more sensitive, but a hot, red, painful area, new firm lump, or nipple discharge should not be dismissed as a normal pregnancy change. Inflammation may arise from irritated skin, blocked milk pathways, or infection, including when milk production has not begun. A breast lump is not automatically mastitis; the pattern, examination, and pregnancy stage guide the next step.

Contact your maternity team or clinician before using prescription or over-the-counter treatment. Wear a comfortable supportive bra, avoid squeezing or deep massage, and use a cool cloth for comfort. Keep notes on the location, onset, skin changes, temperature, and any discharge. If you are expressing or breastfeeding during pregnancy, a lactation consultation can help with gentle milk removal and positioning.

Seek prompt advice for breast redness, warmth, increasing pain, feverish feelings, or a new lump during pregnancy. Urgent assessment is appropriate for rapidly spreading redness, severe illness, fainting, confusion, or breathing difficulty. Ask how quickly the breast should be rechecked if symptoms remain, because pregnancy does not remove the need to investigate a persistent change.

Could this be pregnancy-related sensitivity, inflammation, or infection? Which pain relief and antibiotics are suitable at my stage of pregnancy? Do I need breast imaging? What change should prompt immediate review?