I've had this since i was about 10 years old.. i asked the doctor one time while i was in the hospital but she just said it was heat rash... which i knew it wasn't.. i tried different things for years, scrubbing my arms everytime i showered... in the last year i've started using Palmers cocoa butter formula (the actual butter one, its hard and in a white plastic jar.. ) i put this on every day after showering, and it improved SO much! I actually wasn't so embarrassed about wearing string tops..

And even more recently, i've started exfoliating with St.Ives apricot scrub and then using Johnsons baby lotion (in the pink bottle) and the cocoa butter on alternative days, and its gotten so much better.
Give it a try! i hope this helps
