that isn't accompanied by other obvious skin
changes, such as a rash, is most often caused by dry skin (xerosis). Skin conditions like 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.
It can be due to liver causes also. Get your liver function tests done and
consult a dermatologist.