you may have a genetic condition called keratosis pilaris. keep in mind that this is just a guess since i cannot examine you. i suspect one of your parents have this as well. this is a very common skin condition and very difficult to treat; impossible to cure. if it helps i have it too. do a google search for medical articles about keratosis pilaris.
i have a rash on both of my upper arms. there are small bumps on both of my upper arms and it has been there for awhile now. they kinda look like pimples but it does not go away. i have tried changing soaps and detergents that i use to see if it was some sort of an allergic reaction but there was no change. just looking for possibilities of what it could be and what i should do to get rid of it. thanks!