Itchy lumps all over my legs and arms they are my skin colour and really itch.

Hives: What you describe sounds like hives, a nonspecific reaction of the skin that commonly occurs during an allergic response to some trigger. The trigger to the reaction can be many things; new food, bug bite, reaction to sun screen, etc. Lots of possibilities but only your own detective work may figure it out.Benedryl often helps with the itch.