Hi, I'm 43 and of good health. No bp, diabetes. My LMP date was 23 rd of Feb. For the last 3 days I have been feeling warm blood rush to the left breast. It's warm suddenly like a wave of warm liquid flowing inside.. for a few seconds and then it goes away. I m not sure if it's cos of hormones or anything else. It's only in one breast, the left. I have been feeling a bit of pain in both  breasts which  is normal for me before my period. There are no lumps,  no discharge or any other problems.  This feeling was there the day before yesterday and again today.  Would be grateful if you can tell me what this could be. Thank you.