Hello moms)) I have a problem here, today one breast started hurting, …

Hello moms)) I have a problem here, today one breast started hurting, I discovered it at night, when I was feeding my daughter, specifically when filling the breast with milk during breastfeeding began to hurt only a certain part of the breast as if there was an burn right up and it's itching, and in the evening I look at the part where it hurt, it turned slightly pale and I don't understand why? Has anyone encountered such a problem?