**Core Concept**
The patient's presentation is likely due to galactorrhea or mastitis, but more commonly, it is related to the involution of the breast postpartum, where the breast tissue undergoes changes, leading to fluctuant swelling. This condition is often referred to as **breast engorgement**.

**Why the Correct Answer is Right**
The treatment for breast engorgement involves relieving the discomfort and reducing the breast tissue size. This can be achieved by ensuring good breast drainage, applying warm compresses, and using **topical galactagogues or anti-prolactin medications** to reduce milk production. The use of **cold compresses or ice packs** is also beneficial in reducing breast engorgement. **Option B: Pumping and expressing milk** can also be helpful in relieving breast engorgement by removing excess milk from the breast.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as **breastfeeding support and counseling** may be beneficial for lactating women but is not the primary treatment for breast engorgement.

**Clinical Pearl / High-Yield Fact**
Breast engorgement is a common condition postpartum that can be relieved by applying warm compresses and using topical galactagogues or anti-prolactin medications.

**Correct Answer: B. Pumping and expressing milk**