Breast abscess
A breast abscess is a painful collection of pus that forms in the breast. Most abscesses develop just under the skin and are caused by a bacterial infection.
Most breast abscesses occur as a complication of mastitis, which is a bacterial infection that causes the breast to become red and inflamed.
You should visit your GP if your breast is red and painful. A breast abscess is usually a complication of mastitis (inflammation of the breast).