I went thru same... Biafine was the cure and worked with my severest areas under fold of
RAW areas where skin just melted off.
I was told this happened because they used too many "Boosters," extra radiation tx during your regular time of tx.
It takes a lon time to heal though, have tp be patient. Medciare would not pay for Biafine but a friend who worked for a Dermatologist gave me free samples to get me thru (7 boxes of small sample tubes and I used non stick gauze 3x3 pads on top with tape.
Judi