Well I got to week 5 of rads and thought I'm over my grey hair (just barely grown mind you) and took myself off to the hairdressers and asked him could I get it coloured as it had only started growing.
He said yep not a problem, so I had a colour and a trim to even up the re growth. Now six weeks later I'm booked in tomorrow for another cut because it's still growing unevenly.
The colour made my scalp a bit itchy so I washed it that night and the next morning and it was fine after that.
Cheryle :)