We have a five year old child who has developed red bumps on his skin. A couple days ago they developed on his upper back at the base of his neck. we applied Calamine lotion and they cleared up in a day or so. Today more have developed on his inner legs below where his shorts were. It has been warm for the last few days but I have read that heat rash typically develops beneath the clothing and itches. Our son has not been itching them an this latest development was not under his clothing.