Along with other changes in your body, this hormonal shift can cause your breast ducts and milk glands to become enlarged. It may also result in water retention.
Keep in mind that breast heaviness is rarely a sign of cancer. Here's the . burning or tenderness; nipple turning inward; swollen lymph nodes.
Swelling of the breast can occur as a response to infections or other causes of fluid buildup in the breast tissue. Less commonly, breast cancers can cause breast swelling, particularly the type of breast cancer known as inflammatory breast cancer. Infections are another cause of.