Thank you Julie, that's very helpful. I actually finished the tube of Efudix and 4 weeks treatment last weekend, and must be one of the fortunate people who don't have such a severe reaction. I had horrible itching during the treatment, but now seem to be healing quickly after the first 2 days. I've been applying a light coat of Sorbolene and find it doesn't sting at all, just feels soothing.
As you mentioned, there often isn't much information given by prescribing clinicians, and this website is a wonderful source of help from people who know from experience what you expect. Keep up the great work you're doing!
Thank you again, Jools