Since the itchy sensation is on the whole body without any rash, it can be due to psoriasis,dermatitis,lice,scabies and hives, internal diseases like liver and kidney disorders, diabetes, iron deficiency anemia, irritation and allergic reactions to chemicals, wool, soaps, cosmetics and certain foods can cause itchy skin
You can apply an anti
-itch cream or lotion to the affected area. Oral anti
histamine, such as Benadryl can also be used.