Study to Evaluate the Feasibility of Twice Daily Use of Topical Azelaic Acid in Breast Cancer Patients Undergoing Radiation

A thin layer of Azelaic acid should be applied to the entire area of radiation treatment twice daily, each day of the week (including weekends) starting one week prior to the start of radiation, then during the entire course of radiation treatment (usually 3-5 weeks), and for 3 weeks following the completion of radiation treatment.