Keratosis Pilaris is a common, harmless skin condition that causes dry, rough patches and tiny bumps, commonly on the upper outer arms, and less commonly the outer thighs, cheeks or buttocks and thighs.
This is a very common presentation to the Dermatology clinic. It is treated with glycolic/lactic/salicylic acids and creams for home use (your Doctor will recommend suitable products) or alternatively a course of chemical peels can be performed at the clinic.
Patients are usually very pleased with the results but while the peels and creams make the skin much softer and in better condition they do not completely remove the tiny bumps.
The condition may eventually go away on its own.