I have red spots that were scaly and itchy all over my groin, thigh, torso, and a few on my left arm. What could this be?

?psoriasis. This could be psoriasis....I would initially treat it with topical steroids and anti-histamines....Dr. Wellner.
Hard to say. without more information or a picture. Could it be eczema? fungus? infection? dermatitis? Will have to a practitioner look at it.