In early pregnancy, the part of the breast that typically hurts is the glandular breast tissue, which includes the milk-producing glands (lobules) and milk ducts. This soreness is usually felt as an overall tenderness or heaviness throughout the breasts, rather than being localized to a specific spot. The nipples and areola may also become more sensitive, tender, or even painful to touch. This discomfort is caused by hormonal changes-mainly increases in estrogen, progesterone, and prolactin-and increased blood flow to the breasts, which stimulate breast tissue growth and prepare the breasts for lactation

. Common sensations include:

• General breast tenderness or soreness, often similar to premenstrual breast tenderness but sometimes more intense

• Tingling or itching as the breasts begin to expand and the skin stretches

• Nipple tenderness or sensitivity, sometimes causing discomfort even from light contact like clothing

• A feeling of fullness or heaviness in the breasts

These changes can start as early as 1 to 2 weeks after conception and may last through the first trimester and beyond

. The pain is usually dull or aching but can occasionally be sharp due to rapid growth and hormonal fluctuations

. In summary, early pregnancy breast pain is primarily felt in the entire breast tissue, including the glandular areas and nipples, due to hormonal- driven growth and increased blood flow preparing the breasts for breastfeeding