hi bigmamma,
how about getting a little tub of sudocrem to try?
i find it very good for rough dry sore areas, mums use it on their babies bottoms dont they when they get sore nappy rash.
it probably wouldnt be very suitable if you were going out in public because its white in colour, unless you really rub it in, then itd probably be ok, but when youre there at home, well just liberally apply it, im sure itd help.
its a thick healing cream and i dont think it would easily wash away.