Hi, msmac
Did your Dr. started you on the antibiotic minocycline yet? If you do get the rash, it has some success in helping to keep it under control. As far as topicals go, Aquaphor worked well for my husband - but if I missed even a day of applying it got worse again fast. Apply whatever topicals you end up using to the radiation field after the IMRT.

There is a correlation between a prominent rash and doing well - but still much disputation over what the rash actually means. Best of luck to you in your treatments!