This can cause your breasts to swell, resulting in soreness or tenderness. Other changes in your breast tissue can also result in breast swelling.
This type of breast pain is usually limited to one breast. You may also experience: swelling; bruising; difficulty moving your arm or shoulder. Pectoral muscle.
Do you have breast pain before your period? Premenstrual breast swelling and tenderness are common symptoms of premenstrual syndrome, or PMS.