Small bumps on arms and legs. very itchy. no puss. dry skin. what could it be? no other signs. allergic reaction or more?

Probably: an irritative folliculitis...inflammation of the tiny pouches i which your hairs are growing ..this is often caused BY SHAVING TOO CLOSE or TOO OFTEN! An antibacterial moisturizing soap may help! Ask your PCP (Primary Care Provider) for a suggestion! Hope this helps! Dr Z

Eczema??: Eczema is dry skin, invariably bilaterally symmetric and responds well to treatment. See your doc.