how does Keratosis Pilaris Treatment help in curing dry skin?

from the last ten weeks i had been suffering from very dry skin that had given me sleeplesss nights and which made me apply lotions and moisturizers at such a constant rate that most of them were finished before the due time and then again i used to rush for more to provide relief to  my dry skin.then i decided that i should go to the doctor who reffered to me for a Keratosis Pilaris Treatment .what does the Keratosis Pilaris Treatment do? and what are the kind of limitations that i need to follow under the Keratosis Pilaris Treatment?kindly give me the information.