Breast complications during lactation can include engorgement, cracked or retracted nipples, mastitis, breast abscesses, and lactation failure. Engorgement is caused by a buildup of milk, blood and fluids in the breast tissues due to an imbalance between milk supply and infant demand. It causes swollen, painful breasts. Mastitis is an inflammation of breast tissue that can be infectious or non-infectious. Infectious mastitis requires antibiotic treatment to prevent complications like abscesses. Breast abscesses form when mastitis is left untreated and require drainage procedures. Septic pelvic vein thrombophlebitis refers to infected blood clots in the pelvic veins that can lead to abs