Took bra off, right breast slightly larger, red streaks, areola nipple sore, sometimes burning slightly red under breast. is this cancer? im 51

Not likely: With that said, breast pain and redness of the breast can be associated with cancer. More commonly this is associated with mastitis (infection of the breast). You should see a doctor and have a mammogram.

See a doctor: Sounds like an infection, however, if this has been going on for a long time, cancer should be considered. Please see a doctor in the morning.