Sheila, sorry you're having this to deal with
I didn't see your post until now so am just so surprised and sorry as you were doing so well. At least it's also playing hob with the cancer, so your pain is not in vain, lol.
I've been using a newish ointment during radiation, and my skin is holding up so well my rad onc keeps adding on treatments, will finally have my last one tomorrow, #38 when I was originally scheduled for 33. The ointment is called
"Aquaphor", from the same company that makes Eucerin. This Aquaphor is amazing stuff, comes in a tube for the purse and a small tub for home use. It has kept my underarm area very comfortable right up to the last day, which is not like the last time I had rads; skin got so tight and dry I was afraid to move or stretch for fear it would literally crack. Anyway, you might give it a try. Hope your reduced dose helps reduce the hf thing.
<3 Lolly