Radiotherapy side effects

Here's a photo of me wearing a very loose top (without bra) with bandage under armpit area. It's a PJ top (kindly given to me from Lily of Lily Bliss To You), which I use a lot as it's comfortable when I am at home. I use a very large loose top at home because a bra causes friction on the radiated skin. Photo shows the radiation "burns" under armpit and blistered itchy centre area. I try and restrict movement in right armpit area to avoid friction and use large bandage under armpit. I also try to cover centre blistered itchy area when I am exposed to the sun when putting clothes on line or in car etc. Also I have the sorbolene soap or Dove soap handy in my bag as you are not supposed to use deodorant on radiated armpit. So I dampen soap and use a bit of the soap under my armpit just before radiotherapy. This is so I don't smell of body odour for the poor Radiotherapy Therapists, when I have to lift my arms up and above my head into the moulded "bean bag" at the hospital. This helps avoid any embarrassment. I've been told radiated skin will get worse after treatment for about 2 weeks and will then start to improve.