Controlling Allergies

I have been having some type of hives to appear throughout my body for the past 4 months. I have been to the doctor and to allergy specialists and no one knows what is causing it. I have small bumps that will appear in an area. They almost seem to have a small head or red spot in the center, and are usually the size of a pimple. They usually stay for about 4-5 hours, then they will appear in a different spot, usually 5 or 6 of them in an area, and some times up to 2 or 3 different areas at once. The bumps itch like crazy! Sometimes it even seems that a hot bath make them worse, or just working outside and getting hot. Please help me , I dont know what else to do. We have considered everything from scabbies to bed bugs, but we have 4 kids and none of them have the symtoms, although my husband has had a few of the same type of bumps, and he also says they itch like crazy, just not as many as me. Thanks.

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