you have received a great recommendation from the others here re manuka honey.. I will add, organic, pure coconut oil and pure aloe very directly from the plant or purchased. I prepped coconut oil alone nd/or with aloe, with Jeans cream and manuka honey for anything and everything for my husband..
the skin on his neck during RAD, his lips and even some food grade organic aloe to swish in his mouth when he had mucositis.

I swear his neck did much better because of the multiple -daily applications of coconut oil and honey.
good wishes!