Plasma cell mastitis symptoms: what to look for

The inflammation may be felt behind the nipple or elsewhere in the breast. Some people notice soreness, warmth, firmness, or a lump that persists rather than settling quickly. Discharge can occur, particularly when ducts are inflamed. Symptoms may affect one breast and can occur whether or not you are breastfeeding.

A breast lump is a presentation of plasma cell mastitis, but a lump is not proof of that condition. Infection, duct changes, cysts, and other breast problems can produce overlapping signs. Examination and, when needed, imaging or a tissue sample help distinguish them.

Book an appointment for a new lump, ongoing discharge, or persistent pain. Note when the symptom began, whether it changes with feeding or the menstrual cycle, and whether you have fever or recent nipple injury. Avoid repeated squeezing of the breast or nipple, which can worsen irritation.

If feeding is uncomfortable, a lactation consultation may check positioning and attachment. Information about Breast Pain and Painful Breastfeeding can help you describe the symptom, but neither replaces an examination. A clinician may recommend monitoring, medicines, drainage, or specialist review depending on the findings.

Seek prompt care for fever with a hot, red, painful area; rapidly increasing swelling; pus-like discharge; a wound; or a lump that is enlarging. Get urgent help if you are very unwell, dizzy, confused, or having trouble breathing. New nipple inversion, marked skin dimpling, or a persistent bloody discharge also warrants timely breast assessment.

Ask whether the symptoms suggest infection or another inflammatory problem, whether imaging is needed, how to care for the breast while waiting, and what change should prompt an earlier review. If you are breastfeeding, ask whether feeding or expressing should be adjusted.