Why are my breasts so sore and tender now that I’m pregnant?
Hormonal changes during pregnancy cause increased blood flow and changes in the breast tissue, which may make your breasts feel swollen, sore, tingly, and unusually sensitive to touch. Some women describe the sensation as pain or an exaggerated version of how their breasts feel before their period.
Breast tenderness is one of the earliest earliest signs of pregnancy. It usually starts around 4 to 6 weeks and lasts through the first trimester.