Hi Thank You. I Felt A Sensitive Prickly Feeling In

Hi thank you. I felt a sensitive prickly feeling in my left breast and nipple,when I looked to my nipple there was a small dried cream colored crust over the center of my nipple . I am using Premarin vaginal cream now after having a hysterectomy and reconstructive surgery . Wondering if that cause the secretion from my nipple too what do you think. Worried, Shirley McCready