This thred has got me interested now! Just did some research:
What is keratosis pilaris?
Keratosis pilaris is a very common and completely harmless skin condition. In the population as a whole, keratosis pilaris may affect as many as one person in three. Its name gives some idea of what it is. ‘Keratosis’ means that there is too much keratin – which makes up the tough horny outer layer of the skin: ‘pilaris’ comes from the Latin for hair (pilus). In keratosis pilaris, many small (1 to 2 mm. across) horny plugs can be seen blocking the hair follicles on the upper and outer parts of the arms and thighs.
What causes keratosis pilaris?
Keratosis pilaris is an inherited skin condition, running strongly in many families, sometimes with a generally dry skin (ichthyosis). The way it is inherited varies from family to family, but often fits into an ‘autosomal dominant’ pattern – which means that there will be a 1 in 2 chance that each child of an affected parent will inherit the condition. Keratosis pilaris appears when extra keratin accumulates in the hair follicles. This is usually in childhood, and most obvious during adolescence, often it clears in adulthood. It tends to be better in the summer than in the winter. Keratosis pilaris is harmless, and is not infectious.
How can keratosis pilaris be treated?
No treatment clears keratosis pilaris satisfactorily, and ordinary emollients (moisturisers) are of limited benefit. Creams containing salicylic acid, lactic acid and/or urea are sometimes felt to be more effective. Several simple types can be bought or obtained on prescription, and there is no advantage to be gained from using expensive cosmetic or vitamin creams. In many cases it may be best to wait for the problem to improve on its own.
What can I do?
General measures to reduce skin dryness may help:
* Use mild soaps.
* Apply moisturisers frequently.
* Have tepid showers rather than hot baths.
* The use of an abrasive pad may sometimes be of help.
That's from the dudes at the British association of Dermatologists, I'm sure they're pretty sound and wont mind me posting that. Hope this helps