Do you feel that your breast are red? Blushing?
If you are warm or flushed, it's possible your breast will flush just like your cheeks, and you can notice this without concern.
If one breast appears flushed or "blushing", then yes, you should consider that there is something to ask your gyno about.
Breast infections can present as redness, but will also usually have pain, and cause you to feel ill or have a fever.
Inflammatory breast cancers, whiled very serious, are very rare, but could present as a red blush.
The most common hormonal changes that cause breast fullness or flushing are due to the breast changes due to pregnancy. And remember, if you are checking the pee test, pregnancy tests are most accurate first thing in the morning, or come in to Women's Health Practice and we can run a test for you.