I have had itchy skin with no rash for weeks now. comes in waves. generally, scalp, neck, arms and legs. rarely torso and never feet/ hands. ?

? dry skin: as it is affecting the more exposed areas, however, if symptoms are really bothersome you may want to see a dermatologist, meanwhile, try some skin care techniques: as bathing with cream soap, moisturize your skin right after, hydrate you body well, and avoid prolonged sun exposure, occasional antihistamine might help too, good luck