Mepitel is a 'dressing' that acts like a skin and (depending on your surgery scar whether it can be used on you) can further minimise 'burning' from the radiation.
Pretty well everyone goes pink (and warm) ... some go red (and warm) and some have some skin breakdown. The Rads Nurses will usually check you out before treatment to make sure you have no 'open wounds) and you can also discuss any concerns you may have ... Your Rad Onc will often check you out at some stage during your treatment too.
The Rads Nurses will also recommend lotions & potions to use to minimise 'burning' .... and that 'warmth' may hang around for a couple of weeks after the treatment has finished, possibly longer .... it is nothing to worry about - but you shouldn't expose that area to the sun for a while (wear sun proof clothing) or just cover up in general ...
take care
