Inflammation of breast tissue. Mastitis is generally caused by bacteria infection and occasionally hormonal changes.
Mastitis generally arises when bacteria enter the nipple during breast feeding. It can also be brought on by changes in levels of sex hormones within the body – for example, at the start of puberty.
The condition brings on tenderness, swelling, and pain in one or both breasts. Bacterial mastitis during breast feeding also creates redness and enlargement, and occasionally can result in breast abscess.
Mastitis caused by infection is treated with analgesic drugs and antibiotic drugs, and by expressing milk to relieve engorgement. Mastitis caused by hormonal changes often clears up within a few weeks without the need for treatment.