At birth, or within the following day or two, the mammary glands of an infant may swell, become hard and painful, and secrete a thin fluid much resembling milk. Never make any pressure to remove the secretion, as it may lead to inflammation. When the swelling is moderate, judicious inaction is best, but in severer cases, when the surface is red, and the parts much swollen, and hard and tender to the touch, a hot-water dressing must be constantly applied.