What Causes Red And Itchy Rashes All Over Body?

I m getting a few rashes on different areas of my body everyday. It s been almost 2 weeks now. First time was 2 or 3 bumps on my arm (1 on the triceps and 1 or 2 on the forearm). Then the next day or so, I got 1 or 2 bumps on my leg (1 on thigh and 1 on the shin). It continues onto another day a few bumps on both hips, then some in my back and my most recent ones was 1 on my neck, 1 on my chest, and today; 1 on my cheek, a few on my back, and 1 on my elbow. What s going on? They re raised, red rashes that itch. I hope you can help.