Hi there, I'm sorry you are also on this journey but glad you can reach out on this website.
I was diagnosed with IDC stage 1, ER+ but due to my ki-67 score of 29 (high), chemo and radiation came after the lumpectomy.
The last 5 radiation treatments were a boost which became part of this treatment plan which "brighterdays" explains well.

It was so much infi to take in quickly but I kept thinking whatever my doctors decided on to get rid of this cancer was fine with me (i was 59 years old then).
I did use fresh aloe (it goes a long way) everyday but after the booster my skin was redder and someone recommended a product on Amazon with menthol that I found soothing. Keep in mind you cannot use this until after radiation is complete.
I wish you all the best as you get through this challenge, and you will. Remember to get all your questions answered by your doctors while you are under treatment, you are all on the same team. 😊