My 1 year old son has recently developed a rash on his legs and some on his sides consisting of small, red, pimply, :confused: raised bumps. We've gone through the usual suspects; new foods, detergents, etc. Nothing alongs that line has changed. The only thing that I can figure out is that it is a concrete allergy. Let me explain. The bumps started out on his knees and lower legs after a family member let him crawl on a bare concrete floor in our farm shop. I've heard of allergic reactions occuring when coming into contact with wet cement/concrete or the dry powder, but is it possible to have a reaction from dry, hardened (for about 3 years now) concrete or am I grasping at straws? My son's little legs look terrible! Any info or insight is greatly appreciated. TIA!