My daughter has red bumps on her hands and her arms?

Need much more info: Rashes are sooooo hard to diagnose without looking at them, but further info to even try and narrow it down includes history or any new exposures, foods, soaps, detergents. Does rash itch, burn, hurt. Are there open sores, drainage. Size of bumps, do they come and go. Anywhere else at all on body, just not as many? The questions go on, but these are some of the essentials to help try and diagnose.