The only thing is that I noticed sensitivity while I was doing radiation. I am 1A BC ER positive, HERs negative. Therefore I only did Lumpectomy, 20 sessions of radiation and then Lupron and Latrozole. Nothing else. I did noticed sensitivity in one little part of my scalp two weeks in radiation, then a month later I started on Lupron then Letrozole, the sensation that you describe on the spots that you described I have felt that, but I though it was due to radiation. Now the spot I felt during radiation was more to my right, now I feel that exactly sensation you feel on those spots that you feel. Mine is on and off. I did an appointment with the dermatologist which I will see tomorrow because I though that maybe radiation cause me that skin reaction. I am just trying to guess what it is and now that I see your post you are describing exactly what I feel. I really don't know.