By Dee Braun

There are many things that can cause your breasts to be sore. Injury, sleeping awkwardly, being pregnant, PMS and fibrocystic breast disease are all things that can be to blame. The most common reason for breast soreness is nursing.

When your breasts swell up and become heavy with milk they are considered to be engorged. This normally happens a few days after having your baby and can be very uncomfortable. It usually goes away after you get on a regular nursing schedule.