Canada.... what sun??

I was in Calgary and by the time I waked home the ground beef was frozen. (fact).
So, snowshoes yes!

Seriously. UV exposure damages DNA which is a bad thing, that damage is generally repaired. This is on top of the damage you do with the xrays treatment, so the repair becomes more difficult. The external skin is not what you really want to treat with x rays.....

So cover up ESPECIALLY during treatment but also afterwards....