Mastitis without breastfeeding: what to know

Mastitis is inflammation of breast tissue. Outside breastfeeding, irritation, a blocked duct, skin damage, or bacteria entering through the nipple can contribute. Hormonal changes, nipple piercing, smoking, or an underlying breast problem may also be relevant. The breast may feel tender, warm, swollen, or firm, but symptoms vary and redness is not required. A clinician may examine the breast and nearby lymph nodes, ask about medicines and recent procedures, and arrange imaging if a lump or persistent change needs clarification.

Arrange a medical assessment rather than trying to diagnose the cause at home. Keep the skin clean, avoid squeezing the nipple or lump, and choose a supportive bra that does not press on the sore area. A cool pack wrapped in cloth may ease swelling. Use pain medicine only if it is suitable for you and follow the label or a clinician’s advice. If you have breast pain, you can read more about Breast Pain. Lactation Consultation may still be useful when milk production, pumping, or a recent birth is part of the history.

Seek urgent care for fever with marked illness, rapidly increasing swelling, severe pain, pus, red streaking, or skin that becomes dark or blistered. Arrange prompt review for a new lump, bloody or clear nipple discharge, nipple inversion, an open sore, or symptoms that do not settle. These signs do not identify a single diagnosis, but they should not be watched indefinitely.

Could this be inflammation, infection, a blocked duct, or another breast condition? Do I need an ultrasound or other examination? Which symptoms should make me return sooner, and how will we know whether treatment is working?