Itchy skin that isn't accompanied by other obvious skin
changes, such as a rash, is most often caused by dry skin
(xerosis). Other conditions like psoriasis,dermatitis 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.
She can apply an anti-itch cream or lotion to the affected area. Oral antihistamine, such as Benadryl can also be used.