One warm, one cool

I too have one warm breast and  one cool and my radiotherapy finished May 2017.My oncologist told me it is a side effect of radiotherapy -UV seems to worsen it even thru clothing. It is not really bothering me but guess you could use Calendula cream or Moo Goo or whatever you used during treatment .I had a blue nipple/ areola for over 7 months which was the blue dye they use for the sentinel node biopsy.That said talk to your oncologist if you are worried.