The problem is that there are a number of things that can cause itchy skin, many of which have been covered here by various knowledgeable posters.
It always amazes me how much knowledge there is outside of allopathic medicine and how the internet allows ordinary people to disseminate said knowledge.
Itchy skin could be toxins or allergies, perhaps a change of diet, eliminating wheat and dairy and a good cleansing is in order.
It could be parasites, like Morgellon's which is caused by GM foods.
It could be caused by chlorine or fluoride in the water supply, which means avoiding tapwater for drinking, cooking and bathing. Bathing in goat's milk is thought to be beneficial for pregnant women, where tap water can increase the chance of birthdefects or cancer.
It could be electrosensitivity which means avoiding mobiles, DECt phones, w-fi, microwave ovens, satellite receivers, high tension lines and hybrid automobiles.