Swelling in breasts is a common condition for most women in the second phase of the menstrual cycle. Swelling often causes pain (mild or severe) and discomfort. During PMS, the rate of production of estrogen increases, which inflames the breast ducts and milk glands, resulting in swelling. Breast swelling makes the breasts appear larger than usual. In some cases, the veins become visible to the naked eye owing to swelling. As women tend to retain more water during this time, breast swelling becomes unavoidable.
HOW IS SWELLING IN BREASTS DIAGNOSED?
In rare occasions, breast swelling and tenderness can be a sign of breast cancer and malignant cysts.