What does your doctor say about the tighter breast? Is there a medical term for it?
Your OB/GYN might be able to give you some specific massage techniques.
Next to regular breast massage you could also try lymphatic massage:
http://www.youtube.com/watch?v=WZW58NoVrio
http://www.youtube.com/watch?v=f6jgDk4apog
http://www.youtube.com/watch?v=bLu8EuY8Jko
http://www.youtube.com/watch?v=sOz7V3xNKHE (Myofacial release)
EDIT: Applying heat may help too
Your OB/GYN might be able to give you some specific massage techniques.
Next to regular breast massage you could also try lymphatic massage:
http://www.youtube.com/watch?v=WZW58NoVrio
http://www.youtube.com/watch?v=f6jgDk4apog
http://www.youtube.com/watch?v=bLu8EuY8Jko
http://www.youtube.com/watch?v=sOz7V3xNKHE (Myofacial release)
EDIT: Applying heat may help too