I used pure Aloe and cocoa butter.
Everyone has different things that work. This worked very well for me. I would put the Aloe on first and the cocoa butter helped with the dry and peeling skin. I used it right after radiation and then in the morning a nd at night. The cocoa butter was Palmer with vitamin e and the Aloe was Lily of the Desert Aloe Gel.
You can get both on Amazon.
Hope this helps.

A breast sling and/or strapless cushion to fit inside your bra made by ComfortSlings might give you some relief. It will certainly alleviate any irritation you might incur from accumulated perspiration beneath your breast. The company sells both slings, with cushions on adjustable straps that tuck beneath the breast, and cushions without the straps to tuck inside your bra cup. They are most effective if they are used from the onset of radiotherapy, but they really are game changers at any time in protecting and soothing the skin beneath your breasts. http://www.ComfortSlings.com Good luck!

@meghan13, I hope you saw the helpful posts from @tapgirl and @hopeful64. I moved your question about treatment for radiation burn to this existing discussion:
- What did you do to help radiation burn?
https://connect.mayoclinic.org/discussion/radiation-burn-treatment/
I did this so you can read previous posts and connect easily with others who had radiation for breast cancer.

I used calendula cream purchased on Amazon and should still be using it because the skin is still very dry 4 years later but not itchy. Dry skin can itch though. Regular lotion is not sufficient for me. The dark skin faded away in about 6-9 months on its own and became normal color again. I used silvadene burn cream when the burns were stage 2 (37 treatments) but since you’re healed you won’t need that now. You may always need extra moisturizing in that area but that’s easy. Best of luck to you.