Hi people. There is very big forum for this condition called keratosispilaris.org if you're really interested, and have hours to spare. ;)
Roughly, very roughly, it's predominantly genetic, can affect celtic skins (though also afro caribbean I believe, could be a different thing) basically where the skin doesn't dekeratinize and small plugs (often surrounded by a inflamed redness) of keratin build up. It tends to be worse on the upper arms as the skin there is thickest, or very thick. But people get it on their faces and thighs and other places and children also develop it.
It can't be cured but can be lessened, generally by products that exfoliate either manually (mitts and scrubs) and by AHAs, urea, etc. and really frequent moisturisation.
I don't have it badly at all but used to pick it (gross, it was almost a form of OCD), which just looked even worse. I found the best thing was sun, when it disappeared completely, but in the absence of tropical weather flexitol has worked for me.
I don't know why, but pregnancy makes it flare up on me.
Basically flexitol (yes, the heel balm) is a very high concentration of urea in a cream at a low price. Eucerin 10 percent urea body lotion is 13 pounds, whereas a small tube of Flexitol (most chemists and supermarkets) is a fiver.
I also use it for lips and dry patches as it's a super moisturiser for small patches. I guess it's fine to use anywhere but it can sting broken skin.
Ingrowns may be helped by this too. I'm not sure though.