It is very common for children that show signs of Keratosis Pilaris to have the type of bumps you are describing. The biggest creators of KP are dairy and gluten. So it's very possible it's something she's eating. There are creams you can use, keeping the skin very moisturized, and checking with your doctor are the first steps I would do. KP usually is not a huge deal, often not even itching. But there are kinds that are worse than others, so you want to make the best and most sound decisions. Our younger son has KP and has to be off all gluten, casein, soy, corn, nuts, and most oils due to intolerances, allergies, and processing disorders. If he has a contamination of dairy or gluten, BAM! His cheeks, backs of his bicep area, top of his legs, and his eyebrows flare. He has the more uncommon type of KP.