Skin conditions like psoriasis, dermatitis, eczema 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. One strong possibility is PCOS and
thyroid disease for your wife’s symptoms.
You can apply an anti-itch cream or lotion to the affected area. Oral antihistamine, such as Benadryl can also be used.