The most common cause of a breast abscess

A breast abscess is a pocket of infected fluid within breast tissue. It may follow mastitis, particularly during breastfeeding, when milk stasis and inflammation make drainage more difficult. Bacteria can enter through a cracked nipple or skin opening, although an abscess can also occur outside breastfeeding. The area may become painful, warm, red, swollen, and tender; fever or feeling unwell may occur. A breast lump has several possible causes, so an examination is needed to distinguish an abscess from other breast changes. Infection can worsen if treatment is delayed.

Arrange prompt medical assessment for a painful, hot, or enlarging breast lump. A clinician may examine the breast and use ultrasound to see whether fluid has collected. Treatment can include antibiotics and draining the abscess with a needle or a small procedure; the choice depends on its size, position, and your health. If breastfeeding, ask for practical feeding or expressing advice rather than stopping suddenly without guidance. Keep the area clean and take prescribed medicines as directed.

Seek urgent medical help for rapidly spreading redness, severe pain, high fever, confusion, faintness, or feeling acutely unwell. Contact a clinician promptly if a lump persists, returns, or does not improve with treatment, or if there is nipple discharge that is bloody or clear. These warning signs need assessment because infection is not the only possible explanation for a breast change.

Ask whether the lump needs ultrasound, whether drainage is needed, how to use antibiotics, and how to continue breastfeeding safely if relevant. Ask when the area should improve and what follow-up is needed if the lump remains.