Final answer:
Mastitis is an inflammation of the breast often resulting from a bacterial infection and is treated with antibiotics, not a normal part of breastfeeding that can be left untreated.
Step-by-step explanation:
The nurse's best response regarding mastitis to the woman in the local Le Leche league chapter would be: "Mastitis is an inflammation of the breast tissue, often caused by a bacterial infection." This indicates that mastitis can occur in the context of lactation and breastfeeding when bacteria (often Staphylococcus aureus) infect part of the breast, leading to inflammation.
Appropriate treatment would usually include a course of antibiotics to clear the infection and may also involve measures to ensure that milk can flow properly through the lactation ducts, like proper breastfeeding techniques and positions. It is essential to address mastitis promptly as it can lead to more severe infections or complications if left untreated.