Final answer:
To care for her infected breast, the nurse should ensure complete emptying of the breast during feedings, massage the affected breast gently, and avoid tight-fitting bras.
Step-by-step explanation:
Mastitis is an infection of the breast tissue that can occur when a nursing mother develops a blockage in one of her milk ducts. To care for her infected breast, the nurse should ensure complete emptying of the breast during feedings. This helps to relieve the pain, redness, and swelling and promotes healing. Massage of the affected breast can also be helpful, but it should be gentle and not vigorous. Applying warm compresses to the affected breast can help with the pain and promote blood flow. Tight-fitting bras should be avoided as they can constrict circulation and impede healing.