Radiotherapy

I session 22 of 25 and skin has completely broken down and peeled off under breast , areas of chest as well as blistered and bleeding and dark red to mahogany colour from under arm all way down side then right across chest and under breast. It’s excruciating- making nauseous. Had anyone’s nurses offered dressings etc this stage - I’ve just been told to use moisturiser and keep breast from rubbing- disappointing at this stage - has as no other nurse available- don’t want to fuss but omg I’m in pain and already on opioids. Any suggestions? 3 to go..