This is your second half of menstrual cycle.Premenstrual swelling and tenderness of both breasts occurs during the second half of the menstrual cycle.
Symptoms of premenstrual breast tenderness may range from mild to severe. Symptoms typically peak just before each menstrual period and improve immediately after or during the menstrual period
Breast tissue may have dense, rough, feel to the fingers
During the menstrual cycle, estrogen
production increases and peaks just prior to midcycle. This causes enlargement of the breast ducts. Premenstrually, progesterone
peaks near the 21st day (in a 28-day cycle) and causes growth of the breast lobules (milk glands)that is what you describe as discharge.
So these changers are physiological and normal things. these are not pathological.
so..Hope you can understand.