The following study suggests the use of holoil to manage skin toxicity following radiation:
http://www.ncbi.nlm.nih.gov/pubmed/25544371
Holoil is a medical ointment made of hypericum perforatum and neem oil extracts.
About holoil:
http://www.rimos.com/eng/productLine.cfm?name=HOLOIL%20SYSTEM
About hypericum perforatum:
http://en.wikipedia.org/wiki/Hypericum_perforatum
About neem oil: