Extremely itchy, the area is without a rash, prickly heat, what is?

I used to get it as small spots randomly raised rashes and only above the waist, but now there is no rash. My skin just gets itchy, very hot and I feel like I'm being stuck with needles. My skin is not dry. It occurs at any time but usually after a shower. It drives me to tears. Yesterday my back started to itch and was so red all parts like a sunburn. I'm not taking any medications.

It sounds similar to "Prickly Heat (Miliaria Rubra), which is a condition the sweat glads itchy in warm temperatures and some heat. Also known as a rash, but may come in the form pellets or a rash if skin and causes itching. If your symptoms are aggravated by a shower, try taking a cold shower or bath or stay away from heat (air conditioning). In addition, wear loose clothing and try to reduce sweating. This can give relief. If you are concerned about these eruptions or the cause that you should consult your doctor.

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