## **Core Concept**
The condition described is likely a **breast abscess** or **breast cellulitis**, but given the fluctuant nature of the swelling, it suggests a **breast abscess**. Breast abscesses are collections of pus within the breast tissue, often occurring in lactating women.

## **Why the Correct Answer is Right**
The correct approach for managing a breast abscess, especially in a lactating woman, involves **incision and drainage (I&D)** of the abscess. This procedure is crucial for evacuating the pus, thereby reducing pain, inflammation, and the risk of further complications. Antibiotics may also be prescribed, but I&D is the definitive treatment for abscesses.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is also blank and cannot be assessed.
- **Option C:** Similarly, this option is blank.
- **Option D:** This option is blank as well.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that breast abscesses are often associated with **Staphylococcus aureus**. Despite the need for I&D, **continuation of breastfeeding** is usually recommended, as the abscess is typically a localized infection and expressing milk can help in resolving the condition.

## **Correct Answer:** D. Incision and drainage.