I had 20 rounds of radiation plus 4 days of targeting the exact area in where the tumor was, and honestly it wasn't as bad as I had seen on social media videos. I started applying Cetaphil from the very beginning, I applied right after each radiation session and at night after I showered. When you shower don't let the water run straight to the area, and don't scrub it. 3 weeks of radiation should not be that bad at all, you might not even have side effects or maybe but very minium.

The radio-oncologist did prescribed me two different creams which worked wonderful also. She used to check the area weekly to ensure I was okay.

If you want to use aloe vera you can. I have used aloe vera in the past for sun burn. In my country, we use it straight from the plant you can buy the organic leafs from WholeFoods in the USA they have the leafs you will only need to peel it and the juice will literally come out is very jelly you can just apply on the affected area while peel it or put on a yard and use it from there ( topically) I had use it as I peel it and it's full of vitamin E.

If you drink aloe vera has to be the juice. I wouldn't take it for long term I don't think too much of it is safe. I believe is an article from Mayo Clinic about drinking too much of aloe vera isn't safe.